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Review

The Essential Oil-Bearing Plants in the United Arab Emirates (UAE): An Overview

1
Department of Integrative Agriculture, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain 15551, United Arab Emirates
2
Research and Development Head, Umm Al Quwain University, Umm Al Quwain 536, United Arab Emirates
*
Author to whom correspondence should be addressed.
Molecules 2021, 26(21), 6486; https://doi.org/10.3390/molecules26216486
Submission received: 18 September 2021 / Revised: 10 October 2021 / Accepted: 18 October 2021 / Published: 27 October 2021

Abstract

:
Essential Oils (EOs) are expensive hydrocarbons produced exclusively by specific species in the plant kingdom. Their applications have deep roots in traditional herbal medicine, which lacks scientific evidence. Nowadays, more than ever, there is a growing global interest in research-based discoveries that maintain and promote health conditions. Consequently, EOs became a much attractive topic for both research and industry, with revenues reaching billions of dollars annually. In this work, we provide key guidance to all essential oil-bearing plants growing in the United Arab Emirates (UAE). The comprehensive data were collected following an extensive, up-to-date literature review. The results identified 137 plant species, including indigenous and naturalized ones, in the UAE, citing over 180 published research articles. The general overview included plant botanical names, synonyms, common names (Arabic and English), families and taxonomic authority. The study acts as a baseline and accelerator for research, industry and discoveries in multiple disciplines relying on essential oil-bearing plants.

1. Introduction

Globally, the essential oils (EOs) industry creates billions of dollars of revenue annually. Therefore, more attention has been given recently to this sector, as a natural primary resource for phytochemicals. Indeed, the EOs industry has a wide range of enormous applications in various fields, such as pharmaceuticals, aromatherapy, healthcare, cosmetics, food flavoring, food preservation and the fragrance industry [1].
Briefly, EOs are concentrated phytochemicals comprised mostly of terpenes, oxygenated terpenes, sesquiterpenes and oxygenated sesquiterpenes [2,3]. EOs are volatiles associated with a characteristic aroma resulting from the complex interaction between hundreds of volatiles. These hydrophobic compounds are produced exclusively from certain plant species as secondary metabolites, acting as defense phytochemicals [4].
In fact, EOs applications have deep roots in old traditional practices, in which they were a natural resource to treat infections and sicknesses for hundreds of years [3,4]. However, such traditional practices lack scientific validation, and thus have to be remarkably studied and tested, looking for scientific justification. The studies about essential oils from UAE plants and their biological activities are scanty when compared to other research in plant-based fields. There are studies such as extraction of essential oil of Haplophyllum tuberculatum [5], Teucrium stocksianum [6], Pulicaria glutinosa [7], Cleome amblyocarpa [4] and Moringa peregrina [8] from the United Arab Emirates.
The main objective of this work is to provide key guidance to all EO-bearing plants indigenous and naturalized to the United Arab Emirates (UAE), which included highlights on all available EO-bearing plant species, their families, botanical names, common names (Arabic and English) and taxonomic authority. It worth mentioning that this is the first record in the literature that provides the essential oil-bearing plants of the UAE. The value of such data will accelerate research, knowledge and discoveries in multiple disciplines (e.g., environment, biology, chemistry, chemical engineering, pharmacognosy, pharmacology and healthcare). The findings are key knowledge to justify the rich ethnomedicinal applications of the aromatic medicinal plants of the UAE. Additionally, this study will be supportive to decision-makers in strategic and sustainable planning for essential oil-bearing plants of the region.

2. Study Location

This work covered the UAE as a study location (land area of around 82,880 km2), which is located in the arid Western parts of Asia at the southeast end of the Arabian Peninsula on the Arabian/Persian Gulf (Latitude 22°30′ and 26°10′ N and longitude 51° and 56°25′ E).

Weather Conditions and Soil Analysis

The study location belongs to the arid zone; the climate is characterized by high summer temperatures (around 46 °C) and high humidity rates along the two coastal lines. It is characterized by a low and irregular precipitation rate (60 to 160 mm) [9].
The soil is classified as sandy sodic soil with a high permeability rate, low water holding capacity, low moisture content and low fertility rate [9,10]. Soil salinity is one of its major problems, especially in the coastal lines [11].
Conventional surface water resources include seasonal floods, springs and Falajes. The only groundwater resource comes from aquifers [12]. The high dependency on groundwater aquifers with low recharging rates causes both groundwater depletion and saline water intrusion, creating concerns that aquifer supplies may soon be depleted [13] and indicating a challenging future for the sustainability of the agricultural sector [12].

3. Data Collection Methodologies

To best of our knowledge, all existed references “online and hardcopy printed sources” related to the UAE flora were reviewed to collect the botanical names of all the UAE indigenous and naturalized plants, which were around 800 plant species. The references included Batanouny [14], Western [15], Tanira et al., [16], Wasfi [17], Karim [18], Emirates Natural History Group [19], Böer and Chaudhary [20], Jongbloed et al., [21], Brown and Sakkir [22], Aspinall [23], Zayed Complex for Herbal Research and Traditional Medicine (ZCHRTM) [24], Handa et al., [25], Karim and Dakheel [26], Mousa and Fawzi [27], Sakkir et al., [28], Fawzi and Ksiksi [29], Hurriez [30], Feulner [31], El-Keblawy et al., [32] and the Environmental Agency of Abu Dhabi [33,34].
After collecting the botanical names and synonyms of all documented Emirati indigenous and naturalized plants, each plant was subjected individually to an extensive literature review. The literature was collected using the online resource “Google Scholar”, in which all the published works indexed in “Scopus”, “Web of Science” and “PubMed”. Each plant was searched individually using the keywords “botanical name/synonyms + essential oil”. To the best of our knowledge, all existed published articles were carefully screened and over 180 of the latest articles were cited.

4. Results and Discussions

4.1. A Comprehensive Overview

All the indigenous and naturalized plants of the study location were evaluated and the result was establishing a full list of all Emirati EO-bearing plants (Table 1), including an overview of 137 Emirati EO-bearing plants belonging to 46 families, all cited based on up-to-date literature (over 180 references). Meaning that, EO-bearing plants comprise 17% of the estimated 800 indigenous and naturalized plants.
According to Raut and Karuppayil [185] there are around 2000 identified EO-bearing plants globally. Therefore, it is of high value that a country (with estimated 83 km2 land area and with limited freshwater resources) includes 137 EO-bearing plants. It is worth mentioning that although some of the UAE indigenous and naturalized plants have rich traditional therapeutic applications and belong to important medicinal families, there are no data yet available related to the potential of their EOs. Therefore, it is expected that many of the medicinal and aromatic plants that are available locally are not investigated yet, and the true estimation of the Emirati EO-bearing plants could be underestimated. Examples of these species include, Amaranthus graecizans and Amaranthus viridis from the Amaranthaceae family, which were used in the past by the Bedouin people of the UAE to treat scorpion stings, snake bites and itchy skin rashes as reported by Sakkir et al. [28].
An overview of all EO-bearing plant families growing in the United Arab Emirates, their species number, natural habitats, potential plant parts and ecological status are illustrated in Figure 1, Figure 2, Figure 3 and Figure 4. Based on our results, the families that include the highest number of EO-bearing species are Asteraceae, (22 plants, 16.2%), Fabaceae (11 plants, 8.1%), Lamiaceae (11 plants, 8.1%), Brassicaceae (9 plants, 6.6%), Apiaceae (7 plants, 5.1%) and Poaceae (7 plants, 5.1%), respectively, as shown in Figure 1.
Generally, the most important habitats are the plantations, farmlands and irrigated lands, which host 50% of the Emirati EO-bearing plants. Meanwhile, the most important natural habitats are mountains and rocky terrain, wadis, sandy dunes and coastal saline lines, hosting 36.3, 24.4, 15.5 and 14.8% of the total EO-bearing plants growing in the United Arab Emirates, respectively (Figure 2).
Since plantations and farmlands are hosting 50% of the Emirati EO-bearing plants (which could be due to their ornamental or food production value, or just available naturally as weeds due to the accessibility of water), there should be educational campaigns to educate landlords about extra potentials and economic benefits related to EOs of their available indigenous plants. In addition, with the sharp population growth and the current expansion in the industrial and urbanization activities, strong efforts should be invested to conserve the natural habitats of the EO-bearing plants (e.g., mountains, wadis), and take the same into consideration in strategic planning and management.
Based on our results, shoots (particularly leaves and flowers) are the most important parts that have potential for EOs, in which, 56.3, 37.8 and 29.6% of the Emirati-EO-bearing plants have the potential to extract EOs from their shoots, leaves and flowers, respectively (Figure 3).
Our results show that 82% of the status of the Emirati EO-bearing plants are reported as least concerned plants (low risks of becoming endangered), as shown in Figure 4. However, since recent references that report the status of indigenous plants are limited, and taking into consideration that status of 10% of the plants are not yet evaluated, their real status could be underestimated, especially with the current population growth and urbanization activities.

4.2. A Detailed Overview

A detailed view on the results of the top three richest families (based on the number of EO-bearing species) is divided into three table groups (Table 2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8, Table 9 and Table 10). The first group represents the general botanical information related to the plant species, including form, life form, life cycle, economic value and folk medicine/applications, internationally and locally (Table 2, Table 5 and Table 8). The second group illustrates the data related to the plants’ natural habitats in the UAE, including important locations, soil, habitats, flowering period and wildlife status (Table 3, Table 6 and Table 9). The third group shows detailed knowledge related to plants’ EOs, including potential plant parts, yields, extraction methods, main chemical groups/constituents and biological activities (Table 4, Table 7 and Table 10).
The results of the top three richest families, based on the number of their species, are illustrated from Table 2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8, Table 9 and Table 10, including Asteraceae, Fabaceae and Lamiaceae.
The results showed that the taxa of all the UAE EO-bearing plants belongs to the dicotyledon group, except taxa of 15 plants that belong to the monocotyledon group: Phoenix dactylifera, Cyperus arenarius, Cyperus conglomeratus, Cyperus rotundus, Gynandriris sisyrinchium, Dipcadi erythraeum, Cenchrus ciliaris, Cynodon dactylon, Desmostachya bipinnata, Lolium rigidum, Cymbopogon commutatus, Cymbopogon jwarancusa, Cymbopogon schoenanthus, Alpinia galangal, Zingiber officinale.
According to our extensive literature review, the Iranian plants show the highest number of publications in the field of EO research. Other important plants’ countries of origin in conducting EOs research include India, Saudi Arabia, Tunisia, Nigeria, Jordan and Pakistan.
On the other hand, there are only a few publications that studied the EO-bearing plants of the UAE. Examples of such studies are mainly by Al Yousuf et al. [7], who studied the EO of Pulicaria glutinosa grown in Jebal Al Faya, and Al Yousuf et al., [6] who studied Teucrium stocksianum grown in Khor Fakkan. Additional research studied EOs of Haplophyllum tuberculatum for plants also grown in Khor Fakkan [5]. Al-Marzouqi et al., [130] studied EO of Menthe spicata collected from different regions in the UAE.
Based on the above, there is scarcity in research performed on the EO-bearing plants of the UAE. This is the case while the country has rich biodiversity and has rich traditional medicine applications [16,17,28]. In addition, according to Sakkir et al., [28] 37% of the UAE medicinal plants are applied topically to treat skin problems. This is a direct/indirect indication that the UAE is a good niche for EO phytochemicals of healing benefits. Consequently, it is highly recommended to invest more efforts to study the local EO-bearing plants, seeking new natural resources of phytochemicals of proven biological activity to the country and the world.
Actually, our established databank of the UAE EO-bearing plants offers a solid background to take quick decisions in plant selection and to start up an innovative EOs-based research pathway, which can lead to new chemotypes and promising discoveries. Besides, the databank provides the interested parties (from academic and industrial fields) the opportunity to have an overview on all the Emirati EO-bearing plants, enabling them to highlight the most important indigenous species to supply their needs according to field of interest. At the same time, the databank lists all the UAE EO-bearing plants that need to be conserved from decision-makers to guarantee a sustainable future for the next generation.
It worth mentioning that rich traditional practices are linked (directly or indirectly) to the availability of EOs as active components that lead to particular biological activities of great healing benefits. Additionally, it was reported by a study conducted by Sakkir et al., [28] from the Environmental Agency of Abu Dhabi (EAD) that 37% of the indigenous plants have been used to treat skin problems in the traditional medicine of the UAE. Which can be linked, in one way or another, to the presence of therapeutic grade EO, and therefore could be a positive indicator that the flora of the UAE could pose an excellent resource for EO phytochemicals of various industrial applications.
Thus, it is fundamental to create a comprehensive reference that includes all the UAE indigenous and naturalized species capable of producing EOs. Focusing on the significant role of such a natural resource in a region where fresh water is expensive and where the country’s leadership is working on diversifying the economic resources.
Indeed, it is expected that the essential oil of many indigenous and naturalized medicinal and aromatic plants has not been investigated yet, and the true estimation of the EO-bearing plants growing in the country could be higher than the current findings of this study. Examples of these species include, Amaranthus graecizans and Amaranthus viridis from the Amaranthaceae family, which were used in the past by Bedouin people of UAE to treat scorpion stings, snake bites and itchy skin rashes as reported by Sakkir et al., [28].
According to published research by Shahin et al., [4], the essential oil of the indigenous medicinal Cleome amblyocarpa was extracted and studied for the first time, declaring positive antioxidant activities. Recently, another study extracted essential oil from the seeds of Moringa peregrina and evaluated its chemical composition and antioxidant potentials [8]. Therefore, it is expected that similar results can be found while studying other medicinal and aromatic indigenous species.

4.3. List of Abbreviations

This section provided the meaning and description of all the abbreviations that were used to construct the tables of the UAE (native and naturalized) EO-bearing plants (Table 2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8, Table 9 and Table 10).
  • Botanical Name: Syn. “Synonyms”; Eng. “English”; Arb. “Arabic”.
  • Form: Vine “V”; Grass “G”; Weed “W”; Forb “F”; Herb “H”; Shrub “S”; Tree “T”.
  • Life Form: Geophyte “Ge”; Phanerophyte “Ph”; Chamaephyte “Ch”; Hemicryptophyte “He”; Therophyte “Th”; Cryptophyte “Cr”; Neophyte “Na”.
  • Life Cycle: Annual “A”; Biennial “B”; Perennial “P”.
  • Economic Value: Medicine and/or Folk Medicine “Med”; Food “Fod”; Nutrition “Nutr”; Food Preservation “FPre”; Flavoring “Flav”; Food Aroma “FArom”; Forage “Forg”; Aromatic “Arom”; Essential Oils “EOs”; Cosmetic “Cosm”; Biofuel “Biof”; Fuel “Fuel”; Cleaning and Hygiene “Clea”; Insecticides “Insec”; Ecological “Eco”; Landscaping “Lands”; Other “Oth”: (Dye, Constructions, Household items, Cushions, Fibers, Sponges, Tobacco, Honey Production, Soil Amendment).
  • Folk Medicine:
(Application: yes “+”, no “.”) (Country: Applications examples + Plant parts)
Plants’ part abbreviations: Leaves “L”; Stems and twigs “St”; Pods “Pd”; Buds “Bd”; Bark “Bk”; Flowers “Fl”; Shoots and Aerial parts “Sh”; Fruits “Fr”; Seeds “Se”; Whole Plant “W”).
  • Emirates: Abu Dhabi “AD”; Dubai “Du”; Sharjah “S”; Fujairah “F”; Ajman “A”; Ras Al Khaimah “RAK”; Umm Al Quwain “UAQ”.
  • Important Locations: Al Ain “Ain”; Khor Kalba “K”; Khor Fakkan “KF”; Hajar Mountains “HM”; Ru’us Al-Jibal “RA”; Jebel Hafit “JH”; Wadi Jeema”J”; Hatta “H”; Wadi Lakayyam “WL”; Along the Country “AC”; Country Center “CC”; East Emirates “EE”; North Emirates “NE”; Coasts of North Emirates “CN”; Eastern Coast “EC”; Western coast “WC”; Scattered Locations “SL”
  • Soil: Sand “San”; Silt “Sil”; Rocky or Gravel “Roc”; Saline “Sal”.
  • Habitats: Oasis “Oas”; Sand Dunes “Dun”; Coasts “Cos”; Roadsides “Rod”; Offshore Islands “Off”; Inland Water Habitats “Wat”; Plantations and Farmlands and Irrigated Lands “Plat”; Hillsides “Hil”; Disturbed Sites “DS”; Alluvial and Interdunal Plains “Apl”; Wadis “Wad”; Gardens “Gar”; Fallow Fields and Plains “FF”; Cliffs “Cli”; Mountains and Rocky terrains “Mou”; Plateaux “PX”; Wastelands and Abandoned Fields “AF”; Urban areas “Urb”.
  • Flowering: Months’ abbreviations will be used.
  • Wildlife Status: Fairly common and locally abundant “FC”; Common and widespread locally “CO”; Not common “NC”; Rare and vulnerable “RA”; Not evaluated “NE”; Cultivated Plant “C”.
  • Plant Part: Potential for EOs (Roots “R”; Rhizomes “Rz”; Tuber “Tu”; Leaves “L”; Stems and twigs “St”; Pods “Pd”; Buds “Bd”; Bulbs “Bl”; Bark “Bk”; Flowers “Fl”; inflorescences “IF”; Shoots and Aerial parts “Sh”; Fruits “Fr”; Seeds “Se”; Whole Plant “W”).
  • Physical Properties: EOs physical characteristics (Color/Odor) Plant part + extraction method.
  • Yield (%): EO yield (%, v/w of dry weight). Supported with plant part and extraction method
  • Isolation Method: EO extraction method including:
Hydrodistillation “HD”; Steam Distillation “SD”; Dry Steam Distillation “DSD”; Microdistillation “MD”; Solid-Phase Microextraction “SPM”; Simultaneous Steam Distillation and Extraction “SDE”; Vacuum Distillation “VD”; Ligarine Extraction “LE”; Soxhelt Extraction “SH”; Headspace Analysis “H”; Gas Chromatography Flame Ionization Detector “GC-FID”; Supercritical CO2 Fluid Extraction “SFE”; Microwave-Assisted Hydrodistillation “MW”; Solvent-Free Microwave Extraction “SFME”; Tenax-Trapping “TT”.
  • Main Chemical Groups/Components:
(Main EOs Chemical Groups) and/or (Main/Potential Chemical Constituents) Plant part + extraction method.
  • Biological Activity: [EO Biological Activity] (Activity Details) Plant part + extraction method.
Antitumor “AT”; Antioxidant “AO”; Antifungal “AF”; Antibacterial “AB”; Antimicrobial “AM”; Antibiotic “OT”; Anti-inflammatory “AI”; Antianxiety “AA”; Mosquito Attractant/Repellent “MR”; Insecticidal and Pesticidal Activity “IS”; Larvicidal Activity “LA”; Nematicidal activity “NM”; Oviposition attractant/deterrent activity “OA”; Antihelminthic “Anthelmintic” effect “AH”; Antiechinococcal Activity “AE”; Fumigant Toxicity “FT”; Antidiabetic Activity “AD”; Antistreptococcal “AS”; Anticarcinogenic Effect “AC”; Cytotoxic Properties “CP”; Antimycotoxins “XN”; Phytotoxic Properties and Herbicidal Activity “PP”; Apoptotic Properties “AP”; Antimutagenic Properties “MP”; Analgesic properties “GP”; Antidepressant “DP”; Antispasmodics properties “ASP”; Antinociceptive activity “AN”; Antinociceptive Activity “CE”; Antiseptic “SP”; Stimulant “ST”; Antidiarrheal Activity “DR”.
  • General Notes: The use of “!” means information uncertainty.

4.4. Phytochemicals and Biological Activities from UAE Based Plants

Reviewing the literature, essential oils of the following six native/naturalized UAE plants were investigated under UAE climatic conditions, including Pulicaria glutinosa (Asteraceae) [7], Cleome amblyocarpa (Cleomaceae) [4], Mentha spicata (Lamiaceae) [130], Teucrium stocksianum (Lamiaceae) [6], Haplophyllum tuberculatum (Rutaceae) [5] and Moringa peregrine (Moringaceae) [8], with rich therapeutic applications for the last five species in folk medicine generally and the UAE traditional practices specifically. For example, infusion of C. amblyocarpa leaves was used to treat abdominal and rheumatic pain. M. spicata was used to promote general health-care benefits. Meanwhile, T. stocksianum has various applications related to kidney, stomach pains, thyroid problems and the common cold. The leaves of H. tuberculatum were used to treat scorpion stings, eaten as sedative and crushed in water and drunk to treat painful joints. In the UAE folk practices, the seeds’ oil of M. peregrine has been taken orally for constipation and stomach cramp, and the seeds’ oil mixture with clove oil and cardamom oil has been taken as a drink during labor. Besides, the seeds’ oily extract is used to treat headaches, fever, muscle pains, burns, abdominal pain and constipation. M. peregrine leaves’ extract can be rubbed on skin to treat a skin rash [22].
The rocky soils of the Hajar mountain are among the most famous places for P. glutinosa, T. stocksianum, H. tuberculatum and M. peregrine, including Khor Fakkan and Ru’us Al-Jibal for T. stocksianum and M. peregrine. While the sandy soils of the North Emirates of Dubai, Sharjah, Ajman and Umm Al Quwain are rich in C. amblyocarpa, the mountains, hillsides and wadis of Fujairah, Ras Al Khaimah, Sharjah and Abu Dhabi are rich places for H. tuberculatum [21]. The mint herb M. spicata is widely cultivated in farms for food production purposes, and contributes to the richest essential oils yield which is 10.90%, extracted from shoots using Supercritical carbon dioxide (SCCO2) (Press: 350 bar, Temp: 50°C) [130]. While the essential oil average yields of the aerial parts of each of P. glutinosa, T. stocksianum, H. tuberculatum and C. amblyocarpa, were (according to the highest yield reported in the literature based on UAE) 0.5 [7], 0.34 [6], 0.04 [5] and 0.0266% [4], respectively. The essential oil seeds’ oil of M. peregrine extracted by hydrodistillation reported to be 0.22% [8].
A study of the phytochemicals showed that the major constituents of P. glutinosa essential oils extracted from aerial parts (including flowers) by steam distillation were p-elemene, 7-cadinol and a-cadinol (Sesquiterpenes) [7]. No studies were found to test the biological activities of the essential oil extracts for this shrub.
According to Shahin et al., [4], the major phytochemicals found for C. amblyocarpa essential oil (extracted by hydrodistillation from the whole herb) were isobornyl formate, tetrahydro-linalool acetate, neo-menthyl acetate, 1-dodecene and γ-elemene. The extract showed antioxidant activities (in vitro) using DPPH, FRAP and ABTS assays.
As reported by Al-Marzouqi et al., [130], the main chemical composition of M. spicata leaves’ essential oil (extracted by SCCO2) included carvone, a-pinene, limonene and linalool, which were significantly higher in the locally cultivated M. spicata in comparison to herbs imported from France, Syria and India. Although many studies in the literature reported the various biological activities of M. spicata (e.g., antibacterial, antifungal, antimicrobial, antioxidant, insecticidal and pesticidal, larvicidal activity, mosquito attractant/repellent and antimutagenic properties), however, no studies thus far have tested the biological activity of the oil for the herb cultivated under UAE climatic conditions.
According to Al Yousuf et al. [6], the oil of the aerial parts of T. stocksianum, collected from the UAE, was characterized by a-cadinol and 6-cadinene. Studies based on other countries reported the antinociceptive activity of the oil, with no studies found related to the biological activity of the oil based on the UAE.
Based on the research findings of Al Yousuf et al., [5], the oil extracted from the aerial parts of H. tuberculatum α-phellandrene (10.7–32.9%) being the major component and with significant amounts of other phytochemicals varied in existence and percentages according to the harvesting season. Such phytochemicals include β-caryophyllene, β-pinene, limonene, δ-3-carene, linalool, linalyl acetate, β-caryophyllene and α-terpineol. The biological studies related to H. tuberculatum carried out based on other countries reported that the oil exhibits various biological activities including antifungal, antibacterial, antimicrobial, mosquito attractant/repellent, insecticidal and pesticidal activity and larvicidal activity. On the other hand, no studies have been conducted yet to test these activities and others for the essential oil of this perennial herb grown under the UAE climate.
According to Senthilkumar et al. [8], the seeds’ oil of M. peregrine was characterized by the availability of geijerene (33.38%), linalool (23.36%), caryophyllene oxide (19.28%), n-hexadecane (12.59%) and carvacrol. The oil was found to be a potential alternative choice to the synthetic antioxidants, having radical scavenging activities including; DPPH radical (IC50 = 37.70 μg/mL), ABTS•+ radical (IC50 = 34.03 μg/mL), superoxide anion (IC50 = 36.57 μg/mL), nitric oxide radical (IC50 = 29.15 μg/mL), hydrogen peroxide (IC50 = 43.93 μg/mL) and hydroxyl radical (IC50 = 29.99 μg/mL).
Studies of phytochemicals and biological studies provide scientific justification for the rich therapeutic applications of the previously mentioned native/naturalized plants in the UAE traditional practices. At the same time, it is obvious that there is a lack of essential oil studies based on the UAE, and more efforts are needed to investigate the phytochemicals and biological activities of oils extracted from locally grown and harvested native plants. Besides, comparative studies to compare the essential oil yield (quantitatively and qualitatively) for plants grown in the UAE and other countries are required. This is needed to highlight the native/naturalized plants of superior quality and biological activity, and utilize the same (after standardization) for commercial purposes in various industries (e.g., pharmaceuticals, cosmetics, food preservatives, fragrance and flavor industries).

5. Obstacles and Difficulties

The greatest obstacles and difficulties that were faced are related to the scarcity of the references to UAE wildflowers (Shahin, 2018c). There is so much confusion in the literature between the botanical names and the synonyms, including spelling mistakes that make the task of data collection to list all the Emirati plants (followed by screening and listing the Emirati EO-bearing plants) a difficult and complicated mission.
For example, Cornulaca arabica Botsch and Cornulaca monacantha Delile were mentioned as two different species in the reference of Brown and Sakkir [22], while according to published study [21] Cornulaca arabica Botsch is a synonym of Cornulaca monacantha Delile. Besides, the plants Actiniopteris semiflabellata, Commicarpus boissieri and Cymbopogon jwarancusa were mentioned with minor spelling mistakes as Actioniopteris semiflabellata, Commicarpus boisieri and Cymbopogon jwarancuse, (respectively) in the textbook of Jongbloed et al., [21] which is one of the most important references of the UAE indigenous and naturalized plants.
Moreover, some publications use either the synonyms or the common names instead of using the botanical names. Therefore, while reviewing the literature using the formal botanical names (to screen the EO potential) no results will appear, although, in many cases the plant would be a rich resource of EO phytochemicals. For example, some publications will use Dipcadi serotinum, Cymbopogon parkeri Stapf. Heliotropium europaeum and Calligonum polygonoides instead of using the botanical names, which are Dipcadi erythraeum Webb and Berth., Cymbopogon commutatus (Steud.) Stapf., Heliotropium lasiocarpum and Calligonum comosum, respectively.

6. Conclusions and Future Perspectives

Based on our comprehensive and detailed screening of all the families of the UAE wildflowers, we concluded that there are at least 137 EO-bearing plants in the UAE (17% of the UAE wildflowers) belonging to 46 families. The top three richest families, based on the number of their species, are Asteraceae, Fabaceae and Lamiaceae.
Most of the UAE EO-bearing plants have rich traditional medicinal applications and other economic values, such as pharmaceuticals, nutrition, aromatherapy, fragrance and flavoring. Generally, the shoots (especially leaves and flowers) are the most important parts to extract EO phytochemicals (e.g., terpenoids) of valuable biological activities, such as antioxidant, antimicrobial and antitumor properties.
The UAE EO-bearing plants are widespread in the areas of plantations, mountains and wadis of the country. Serious efforts to educate landlords about the great value of the UAE EO-bearing plants are needed, to make sure that these expensive species are well-cultivated in a sustainable manner. Besides, strong efforts related to management and strategic planning should be employed to conserve the natural habitats of the EO-bearing plants.
All our obtained results support that the UAE is a rich natural resource for the native and naturalized EO-bearing plants that have rich ethnobotanical applications of multiple economic potential.
Therefore, serious efforts are needed to standardize the oil yield (quantitatively and qualitatively) for all listed essential oil-bearing plants of the UAE, and to focus sustainability on native essential oil-bearing plants of industrial applications at research and commercialization level. Taking into consideration that this field is promising for multiple research disciplines and discoveries.

Author Contributions

Conceptualization and methodology, S.M.S.; validation, A.J. and M.A.M.A.; writing—original draft preparation, S.M.S.; writing—review and editing, A.J.; supervision, M.A.M.A. and A.J.; funding acquisition, M.A.M.A. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by UAEU fund No. 31F029, (Ph.D. research grant).

Acknowledgments

We express our appreciation to David Allen from the International Union for Conservation of Nature (IUCN) for providing references related to UAE native plants. We are also thankful for the Ministry of Climate Change and Environment (MOCCAE)—UAE, for the invitation to participate in the Red List National Meeting (15–19 September 2019) and the possibility to exchange knowledge with knowledgeable researchers in the field of native plants (e.g., Gary R. Feulner, Ali El-Keblawy, and members of Sharjah Seed Bank). The support from Shyam S. Kurup, Department of Integrative Agriculture, CAVM, UAEU is gratefully acknowledged. In addition, many thanks to Al Foah Research Farm (Especially Arshed El Daly)—United Arab Emirates University (UAEU) for sharing knowledge related to native plants. Furthermore, we would like to thank Rahaf Ajaj (Abu Dhabi University) for her assistance in proofreading. This research was supported by the UAEU, College of Food and Agriculture, fund No. 31F029.

Conflicts of Interest

The authors declare no conflict of interest.

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Figure 1. Families of EO-bearing plant species in the UAE.
Figure 1. Families of EO-bearing plant species in the UAE.
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Figure 2. Habitats of EO-bearing plants in the UAE.
Figure 2. Habitats of EO-bearing plants in the UAE.
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Figure 3. Major plant parts for EO production in the UAE.
Figure 3. Major plant parts for EO production in the UAE.
Molecules 26 06486 g003
Figure 4. Status of EO-bearing plants in the UAE.
Figure 4. Status of EO-bearing plants in the UAE.
Molecules 26 06486 g004
Table 1. An overview of indigenous and naturalized essential oil-bearing plants of the UAE.
Table 1. An overview of indigenous and naturalized essential oil-bearing plants of the UAE.
FamilyBinomial Taxonomic Authority Synonyms “Syn.” and/or Common Names (English “Eng.” and/or Arabic “Arb.”) Reference Categorizing the Plant as Essential Oil-Bearing PlantReference for UAE Nativity/Natuaralization
1Aizoaceae/Ficoidaceae (Mesembryanthemum, carpetweed family) Sesuvium portulacastrumL.Sesuvium verrucosum Raf. (Eng. Shoreline purslane, sea purslane, sesuvium)[35][21,22]
2Amaranthaceae (Cockscomb family) Achyranthes asperaL.(Eng. Prickly chaff flower) (Arb. Saif el-jinn, umdhrese, sehem, ar-ray, mahoot, na’eem, wazer)[36][21,22]
3Aerva javanica(Burm. f.) Juss. ex Schul.(Eng. Desert cotton, snow bush) (Arb. Al ara’, twaim, efhe, tirf) [37,38][15,18,21,22,23,24,25,27,28,32]
4Chenopodium albumL.(Eng. Lamb’s quarters, melde, goosefoot, fat-hen, white goosefoot) (Arb. Shulah, ‘aifajan, rokab al-jamal)[39][15,21,22]
5Anacardiaceae (The cashew, sumac family) Pistacia khinjukStocks. [40][21]
6Apiaceae/Umbelliferae Ammi majusL.(Eng. Bishop’s flower, bishop’s weed) (Arb. Sannout, sheeh, khilla “khilla sheitani”, nayniya) [41][15,21,22,28]
7Anethum graveolensL.(Eng. Dill Weed) [42][15,21]
8Ducrosia anethifolia(DC.) Boiss.(Arb. Basbaz, haza)[43][15,21,22,28]
9Pimpinella eriocarpaBanks and Sol.(Arb. Kusaybirah) [44][15,21]
10Pimpinella puberula(DC.) Boiss. [45][15,21]
11Scandix pecten-venerisL.(Eng. Shepherd’s-needle, Crib Gwener) (Arb. Mushet)[46][15,21]
12Torilis leptophylla(L.) Reichenb.f.(Syn. Caucalis leptophylla) (Eng. Bristle-fruited hedge-parsley) [47][21]
13Apocynaceae (Dogbane family)Catharanthus roseus(L.) G. Don(Syn. Vinca rosea) (Eng. Madagascar periwinkle) [42][15]
14Nerium oleanderL.(Syn. Nerium mascatense) (Eng. Rosebay, olender) (Arb. Defla, haban) [48][15,21,22,28]
15Plumeria rubraL.(Eng. Nosegay, frangipan)[49][15,21,22,28]
16Calotropis procera(Aiton) W.T. Aiton(Eng. Apple of Sodom, Sodom apple, stabragh, kapok tree, king’s crown, rubber bush, rubber tree, Sodom’s apple milkweed) (Arb. ‘ushar, shakjr, ‘asur, ashkhar “askar”)[50][21,22,28]
17Arecaceae (Palmae, palmaceae family, palm trees) Phoenix dactyliferaL.(Eng. Date palm, date palm tree) (Arb. Nakhl, amm-amm) [51][15,21,22,28]
18Asteraceae/Compositae/Anthemideae (Sunflower family)Anthemis odontostephanaBoiss.(Arb. O’qhowan) [52][15,21]
19Artemisia sieberiBesser (Eng. Wormwood)[53][28]
20Calendula arvensisL.(Eng. Field marigold) (Arb. Ain el baqr, eqhwan-asfar, hanwa, hanuwa) [54][15,21]
21Cichorium intybusL.(Eng. Blue daisy, blue dandelion, blue sailors, blue weed, bunk, coffeeweed) (Arb. hindibaa bareeya, chicoria) [55][15,21,28]
22Conyza bonariensis(L.) Cronq.(Syn. Conyza linifolia (Willd.) Tackh) (Eng. Flax-leaf Fleabane, Wavy-leaf Fleabane, hairy fleabane) (Arb. hashishat el-jebal, tebaq) [56][21,22]
23Eclipta prostrataL.(Syn. Eclipta alba (L.) Hassk.) (Eng. False daisy, Trailing eclipta ). (Arb. Sa’ada, sauweid, masadate)[57][15,21]
24Grantia aucheriBoiss.No Information[58][27]
25Launaea nudicaulis(L.) Hook. f.(Eng. Hawwa Baqrah ara, hindabah ara, huwah ara, naked launea) (Arb. Huwah al ghazal, safara, huwah, hindabah)[59,60][15,21,22]
26Matricaria aurea(Loefl.) Sch. Bip.(Eng. Golden chamomile) (Arb. Babunaj)[61][21,28]
27Matricaria chamomillaL.(Syn. Matricaria recutita) (Eng. Chamomile, camomile, german chamomile)[62][63]
28Pluchea arabica(Boiss.) Qaiser and Lack (Eng. Pluchea) (Arb. godot)[64][28]
29Pluchea dioscoridis(L.) DC.(Syn. Conyza dioscoridis (L.) Desf., Baccharis dioscoridis L.) (Eng. Ploughmans spikenard, marsh fleabane) (Arb. Sahikee, barnof) [65][15,21,22]
30Pluchea ovalis(pers.) DC.(Eng. Woolly camphor-weed)[66][15,21]
31Pseudognaphalium luteo-album(L.) H. and B.(Syn. Gnaphalium luteo-album L.) (Eng. Cudweed) (Arb. sabount el’afrit)[67][21,22]
32Pulicaria arabica(L.) Cass.(Syn. Inula arabica L./Pulicaria elata Boiss./Pulicaria laniceps Bornm.) (Arb. Iqat, abu ‘ain safra)[68][21]
33Pulicaria glutinosaJaub. and Spach(Arb. Thal, fal, shajarat fal, muhayda, mithidi, shajarat al-mithidi, shneena, zayyan) [7][15,21,22]
34Pulicaria inuloides(Poir.) DC.No information[69,70,71][21]
35Pulicaria undulata(L.) C.A. Meyer(Syn. Pulicaria crispa (Forssk.) Benth.) (Eng. Crisp-leaved fleabane) (Arb. Gathgeth, jithjath, ‘urayfijan) [72][15,21,22]
36Rhanterium epapposumOliv.(Eng. Rhanterium) (Arb. Arfaj) [73][15,21,22]
37Senecio glaucusL. ssp. coronopifolius (Maire) Al.(Syn. Senecio desfontanei Druce) (Eng. Maire alexander, buck’s horn groundsel) (Arb. Qorreis, murair, zamlooq, shakhees, rejel al ghurab) [74][15,21,22]
38Seriphidium herba-alba(Asso) Sojak(Syn. Artemisia herba-alba Asso/Artemisia inculta Del) (Eng. Wormwood, white wormwood) (Arb. Ata, ghata, shih) [75,76][21]
39Sphagneticola trilobata (Syn. Wedelia paludosa DC.) (Eng. Singapore daisy, creeping-oxeye, trailing daisy, wedelia)[77][15]
40Bignoniaceae (Bignonias family) Jacaranda mimosifoliaD. Con(Eng. Jacaranda, blue jacaranda, black poui, fern tree) [78][15]
41Boraginaceae (Borage, forget-me-not family)Arnebia linearifoliaDC.No Information[79][21]
42Heliotropium europaeumL.(Syn. Heliotropium lasiocarpum Fisch. and Mey.) (Eng. European heliotrope, european turnsole) (Arb. Karee) [80][15,21,22]
43Trichodesma africanum (Syn. Trichosdesma africana (L.) R. Br.) (Eng. African barbbell)[81][15]
44Brassicaceae/Cruciferae (Cress, mustard family) Capsella bursa-pastoris(L.) Medik.(Eng. Shepherd’s-purse) (Arb. Kis al ra’y) [82][15,21,22]
45Cardaria draba(L.) Desv.(Syn. Lepidium draba) (Eng. Whitetop, hoary cress) (Arb. lislis) [83][21,22]
46Coronopus didymus(L.) Sm.(Eng. Lesser swine-cress) (Arb. Rashad al-barr)[84][21,22]
47Erucaria hispanica (Eng. Spanish pink mustard, erucaria myagroides) (Arb. Khezaam, saleeh, kromb al sahra) [79][15,21]
48Eruca sativaMill.(Eng. Salad rocket, rucola, rucoli, rugula, colewort, roquette, garden rocket, rocket) (Arb. Girgir, jirjeer)[85][15,21,22,28]
49Savignya parviflora(Delile) Webb(Eng. Jaljalan, kanad al barr, gulgulan, girgees, small whorled cheeseweed) (Arb. Khzaymah, al-thee, jerjees “girgees”, gongolan “qunqulan, jaljelan, galeigelan, bithman”) [86][15,21,22]
50Schimpera arabicaHochst. and Steud. [79][15,21]
51Sinapsis arvensisL.(Syn. Sinapis arvensis L.) (Eng. Charlock, charlock mustard, wild mustard) [87][15,21]
52Sisymbrium irioL.(Eng. London rocket) (Arb. Howairah, shelyat, figl el-gamal, harrah) قراص حمار[88][21,28]
53Capparaceae/Capparidaceae (Caper family) Capparis cartilagineaDecne.(Eng. Caper) (Arb. Qubr, sediru, ashflah, lezaf “losef, lusfeh, ewsawf) [89][15,21,22,26,28]
54Capparis spinosaL.(Eng. Caper bush, flinders rose) (Arb. Kobar, lasafa, fakouha, shawk mal homar, shafallah, delayeer, dabayee) [89,90][15,21,22,28]
55Caryophyllaceae/Illecebraceae (Carnation family) Stellaria media(L.) Vill.(Eng. Chickweed, common chickweed, chickenwort, craches, maruns, winterweed, lawn weed) (Arb. Meshit, hashishet el-qizaz, qizaza) [91][15,21]
56Casuarinaceae (Beefwood family) Casuarina equisetifolia (Syn. Casuarina equistetifolia J.R. and G. Forst.) (Eng. Rhu, casuarina tree) [92,93][15]
57Cistaceae (Rock-rose, rock rose family) Helianthemum kahiricumDelile(Eng. Rock rose, sun rose) (Arb. Ragroog, qsasah, hashma) [94][15,21,22]
58Cleomaceae Cleome amblyocarpaBarr. and Murb.(Syn. Cleome africana, Cleome arabica, Cleome daryoushian) (Eng. Spider flower) (Arb. Adheer, durrayt an-na’am, khunnayz, ufaynah)[4,95][21]
59Cleome brachycarpaVahl ex DC.(Syn. Cleome vahliana Farsen) (Arb. Za’af, mkhaysah) [96][15,21]
60Cleome droserifoliaDel.(Syn. Roridula droserifolia Forssk.) (Eng. Cleome herb)[97][15]
61Cleome gynandraL.(Syn. Gynandropsis gynandra (L.)Briq.) (Eng. Shona cabbage, African cabbage) (Arb. Abu qarim)[98][21]
62Combretaceae Terminalia catappaL.(Eng. Indian almond-wood, bastard almond, andaman badam) هليلج هندي[99][15]
63Convolvulaceae (Morning glory, bindweed family) Ipomoea aquaticaForssk.(Eng. Kang kong, water convolvulus, water spinach, swamp cabbage, ong choy, hung tsai, rau muong) السبانخ المائي[100][21,22]
64Ipomoea obscura (Eng. Obscure morning-glory, small white morning glory)[101,102][21]
65Cucurbitaceae (Gourd family) Momordica charantiaL.(Eng. Bitter melon, bitter gourd, bitter squash, balsam-pear) [103,104][24]
66Luffa acutangula(L.) Roxb.(Eng. Angled luffa, chinese okra, dish cloth gourd, ridged gourd, sponge gourd, vegetable gourd, strainer vine, ribbed loofah, silky gourd, ridged gourd, silk gourd, sinkwa towelsponge)[103,105][21]
67Cyperaceae (Sedges family) Cyperus arenariusRetz.(Syn. Bobartia indica L.) (Eng. dwarf sedge)[106][21,22,34]
68Cyperus conglomeratusRottb.(Eng. Cyperus, mali tamachek saad) (Arb. Thenda. Ayzm, chadrum, qassis, rasha) [107][15,21,22,34]
69Cyperus rotundusL.(Eng. Coco-grass, Java grass, nut grass, purple nut sedge, red nut sedge, Khmer kravanh chruk) (Arb. Sa’ed, sa’ed al hammar, hasir) [108][15,21,22,28,34]
70Euphorbiaceae (Spurge, castor, euphorbias family) Euphorbia helioscopiaL.(Eng. Sun spurge, madwoman’s milk) (Arb. Haleeb al-diba, sa’asa, tanahout, kerbaboosh) [109][21,22]
71Euphorbia hirtaL.(Eng. Asthma plant, asthma weed, pill-bearing spurge) (Arb. Libbein, demeema, menthra) [110][15,21,22]
72Euphorbia peplusL.(Syn. Euphorbia peplis L.) (Eng. Petty spurge, radium weed, cancer weed, milkweed)
(Arb. Khunaiz)
[111][21,22,28]
73Ricinus communisL.(Eng. Castor oil) (Arb. ‘Arash, ash’asheh, khasaab, khirwa “khurwa’a”, junijund, tifsh) [112][15,21,22,28]
74Fabaceae/Leguminosae/Papilionoideae (Pea family) Alhagi maurorumMedik.(Syn. Alhagi graecorum Boiss.) (Eng. Camelthorn, camelthorn-bush, caspian manna, persian mannaplant) (Arb. Shwaika, agool, heidj)[113,114][15,24]
75Lotus halophilusBoiss. and Spruner(Eng. Greater bird’s foot trefoi) (Arb. Horbeith “hurbuth”, garn al ghazal, ‘asheb al ghanem) [79,89][15,21,22]
76Medicago polymorphaL.(Eng. California burclover, toothed bur clover, toothed medick, burr medic) [115][15,21,22]
77Medicago sativaL.(Eng. Alfalfa, lucerne) [116][15]
78Rhynchosia minima(L.) DC.(Eng. least snout-bean, burn-mouth-vine and jumby bean) (Arb. Baql)[117][15,21,22]
79Tephrosia persicaBoiss.(Syn. Tephrosia apollinea (Delile) DC.) (Arb. Dhafra, omayye, nafal)[118][15,21,32]
80Trigonella hamosaL.(Eng. Branched fenugreek, Egyptian fenugreek) (Arb. Nafal, qutifa, qirqas, darjal, eshb al-malik, qurt) [79][15,21,22]
81Ononis siculaGuss.------[119][21]
82Acacia nilotica(L.) Delile(Syn. Acacia Arabica (Lam.) Willd.) (Eng. Gum arabic tree, babul/kikar, Egyptian thorn, sant tree, al-sant, prickly acacia) (Arb. Sunt garath “kurut”, babul, tulh. Fruit: karat) [120,121][15,21,22,26,28]
83Acacia tortilis(Forssk.) Hayne(Eng. Umbrella thorn) (Arb. Samr “samur”, salam) [120,122][15,21,22,26,32]
84Prosopis farcta(Banks and Sol.) Mac.(Eng. Dwarf mesquite, syrian mesquite) (Arb. Yanbut, agoul, awsaj) [123][15,21,22]
85FrankeniaceaeFrankenia pulverulentaL.(Eng. European Frankenia, European sea heath) (Arb. Molleih, hamra (hmaira), Umm thurayb) [124][21,22]
86Geraniaceae (Geranium family) Erodium cicutarium(L.) L Her. Ex Aiton(Eng. Redstem filaree, redstem stork’s bill, common stork’s-bill, pinweed)[125][21]
87Hypericaceae (St. Johnswort family)Hypericum perforatum (Eng. St.John’s wort)[126][30]
88Iridaceae (Irises family) Gynandriris sisyrinchium(L.) Parl.(Syn. Iris sisyrinchium L., Moraea sisyrinchium (L.) Ker Gawl.) (Eng. Barbary Nut, mountain iris) (Arb. Khowais, su’ayd, ‘unsayl) [127][15,21]
89Lamiaceae/Labiatae (Mint, deadnettle family) Lallemantia royleana(Benth.) Benth.(Eng. Bian bing cao)[128][21]
90Mentha spicata spicata (Eng. Spearmint, spear mint) [129][63,130]
91Ocimum forsskaoliiBenth.(Syn. Ocimum forskolei Benth.) (Eng. Rehan, sawma)
(Arb. Basil)
[131][15,21,28]
92Salvia aegyptiacaL.(Eng. Egyptian sage) (Arb. Ra’al, na’aim, ghbeisha, shajarat al ghazal, khizam)[132][15,21,22,24,28]
93Salvia macilentaBoiss.(Eng. Khizama) (Arb. Khmayzah lethnay, bithman)[133][15,21,22]
94Salvia macrosiphonBoiss.(Arb. Shajarat Al Ghazal)[134][15,21]
95Salvia mirzayaniiRech.f. and Esfandiari [135][21]
96Salvia spinosaL.(Arb. Shajarat al-ghazal) [136][21,22]
97Teucrium poliumL.(Eng. Felty germander) [137,138][21,28]
98Teucrium stocksianumBoiss.(Eng. Jadah, yadah, Ja‘adah) (Arb. Ya’dah, brair) [6,139][15,21,22,24,32,28]
99Zataria multifloraBoiss.(Eng. Za’atar, shirazi thyme) [140,141][24]
100Liliaceae (lily family)Dipcadi erythraeumWebb and Berth.(Synonym: Dipcadi serotinum (L.) Medik.) (Eng. Brown Lily, Hyacinthus serotinus, mesailemo, besailemo) (Arb. Busalamo, ansel, misselmo, shkal).[142][15,21,22]
101Lythraceae Lawsonia inermisL.(Eng. Egyptian Privet, the henna tree, mignonette tree) [143][15,21,22,24,28]
102Malvaceae/Tiliaceae (Mallows family) Corchorus depressus(L.) Stocks.(Eng. Mulakhiyah al bar, sutaih, rukbat al jamal) (Arb. Matara, seluntah, mulukhia el bar, waikai) [144][15,21,22]
103Moringaceae (Moringa family)Moringa peregrina(Forssk.) Fiori(Eng.Wild drumstick tree) (Arb. Shu’, yasar, baan, ’aweyr, bayreh, terfaal, yayn) [8][21]
104Myrtaceae (Myrtle family) Eucalyptus camaldulensisDehnh.(Syn. Eucalyptus camaldulensis Dehn.) (Eng. River red gum, red gum, Murray red) [145][15]
105Eucalyptus pimpinianaMaiden“Eng. Pimpin mallee, red dune mallee”[146][15]
106Oleaceae (Olive family)Jasminum sambac(L.) Ait.(Eng. Arabian jasmine) الفل[147][15]
107Olea europaeaL. subsp. Cuspidata(Wall. Ex G. Don) ciferri (Eng. Olive tree) (Arb. ‘Itm, mitan) [148][21]
108Plantaginaceae (Plantain family) Plantago amplexicaulisCav.(Eng. Ispaghula, Plantain, rablat al mistah, lesan al hamal) (Arb. gerenwa, rabl, aynsum, khannanit an na’ja) [79][15,21,22]
109Plantago boissieriHausskn. and Bornm.(Arb. Rabl, yanam) [149][15,21,22]
110Poaceae/Gramineae (Gramineae, true grasses family) Cenchrus ciliarisL.(Eng. Buffelgrass, African foxtail grass, sand-burr) (Arb. Sadat, khadir, thumum, gharaz, drab, labaytad) [79][15,21,32,34]
111Cynodon dactylon(L.) Pers.(Eng. Bermudagrass, dubo, dog’s tooth grass, Bahama grass, devil’s grass, couch grass) (Arb. Thi’il, negil “najiel”, najm, sheel, bizait) [150,151][15,21,34]
112Desmostachya bipinnata(L.) Stapf(Eng. Halfa grass, big cordgrass, salt reedgrass) (Arb. Halfa, hafla and sanaiba) [152][15,21,34]
113Lolium rigidumGaudin(Eng. Wimmera ryegrass, Swiss rye grass) (Arb. Hayyaban, shilm, ziwan, simbil, rabiya) [153][15,21]
114Cymbopogon commutatus(Steud.) Stapf (Syn. Cymbopogon parkeri Stapf.) (Eng. Incense grass, Rosagrass) (Arb. Alklathgar, sakhbar, hamra, idhkhir, khasaab) [154][15,21,22,34]
115Cymbopogon jwarancusasubsp. olivieri (Boiss.)(Eng. Oilgrass, iwarancusa grass) [155][20,21]
116Cymbopogon schoenanthus(L.) Spreng.(Eng. Camel grass, camel’s hay, fever grass, geranium grass, West Indian lemon grass) (Arb. Adlghar, hashmah) [155,156][15,21,22,24,28,34]
117Polygonaceae (buckwheat family)Calligonum comosumL’Her.(Synonym: Calligonum polygonoides subsp. comosum (L‘Her.) Soskov) (Eng. Fire bush) (Arb. Arta, waragaat as-shams, ‘abal, dhakar) [157,158,159][15,21,22,24,28]
118Rumex vesicariusL.(Eng. Sorrel, Bladder dock, Rosy dock, Ruby dock) (Arb. Humayth “hommeid, hummad, hambad”, hambasees) [160][15,21,22,24,28]
119Ranunculaceae (Buttercup, crowfoot family) Nigella sativaL.(Eng. Black seed, black cumin) [161][24]
120Rhamnaceae (Buckthorn Family) Ziziphus jujubaMill.(Eng. Chinese date, jujube) [162][15]
121Ziziphus spina-christi(L.) Willd.(Eng. Christ’s thorn jujube, Christ’s torn, nabk tree) (Arb. Sidr, ber, ‘ilb, zaqa) [163][15,21,22,28]
122Rubiaceae (coffee, Rue, madder, bedstraw family)Galium tricornutumDandy(Eng. Rough corn bedstraw, roughfruit corn bedstraw and corn cleavers)[164][21]
123Rutaceae (Rue, citrus family) Haplophyllum tuberculatum(For.) A. Juss.(Syn. Haplophyllum arabicum) (Eng. Sazab, zeita, kheisa, mesaika) (Arb. Srayu’u asraw, mekhiseh “Umm musayka”, kirkhan, zuqayqah, furaythah, zifra al-tais, sinam al-tais. Khaisa, sjaharet al-ba’ud, sjaharet al-ghazal, tafar al-tays, khokhawot, mekhisat al-hamr) [165][15,21,22,28]
124Ruta chalepensisL.(Eng. Rue, fringed rue) [166][22,24]
125Salvadoraceae/Salourloruceae Salvadora persicaL.(Eng. Toothbrush tree, mustard tree, mustard bush) (Arb. Suwak, rak, (‘arak, yeharayk, ehereek) [167,168][15,21,22,24,28]
126Solanaceae (Nightshade family)Withania somnifera(L.) Dunal.(Eng. Ashwagandha, Indian ginseng, poison gooseberry, winter cherry) (Arb. Babu “ebab”, sumal far, haml balbool, morgan, simm, frakh) [169][21]
127Tamaricaceae (Tamarisk family) Tamarix nilotica(Ehrenb.) Bunge(Syn. Tamarix mannifera (Ehrenb.) Bunge (h)/Tamarix arabica Bunge) (Eng. Nile tamarisk) (Arb. tarfa’, “terfat”, athl) [170][15,21,22,26,28]
128Verbenaceae (Verbena, vervain family) Clerodendrum inerme(L.) Gaertn.(Eng. Vanajai, garden quinine) [171][15]
129Lantana camaraL.(Eng. Tickberry) [172,173][15]
130Phyla nodiflora(L.) Greene(Syn. Phyla nodiflora/Lippia (Phyla) nodiflora (L.) Greene/Phylain nodiflora/Lippia nodiflora (L.) Mychx.) (Arb. Berbin al-jedi, herum dezen, thayyel sini, lebbia, farfakh) [174][15,21]
131Vitex agnus-castus L. L.(Eng. Chaste tree) [175,176][20,21,22]
132Avicennia marina(Forssk.) Vierh.(Syn. Avicennia marina L.) (Eng. Grey mangrove, white mangrove) (Arb. Qurm, gurm) [177][15,21,22,28]
133ViolaceaeViola odorataL.(Eng. Sweet violet, garden violet, common blue violet, viol, viotea) [178,179][24]
134Zingiberaceae (Ginger family)Alpinia galanga(L.) Sw(Eng. Greater galangal, thai galangal, blue ginger, thai ginger) [180,181][24]
135Zingiber officinaleRoscoe(Eng. Ginger) [182][24]
136Zygophyllaceae (Caltrop, bean-caper, creosote-bush family) Peganum harmalaL.(Eng. African rue, Syrian rue, wild rue, harmal shrub, harmel, isband, ozallalk, steppenraute) [183][24]
137Tribulus parvispinusPresl(Syn. Tribulus terrestris) (Eng. Puncture vine, Land caltrops, puncture vine) (Arb. Shershir, kuteb “qatb”, hisek, badl, shuraysah, shiqshiq, dreiss) [184][15,21]
Table 2. The UAE EO-bearing species of Asteraceae/Compositae/Anthemideae Family.
Table 2. The UAE EO-bearing species of Asteraceae/Compositae/Anthemideae Family.
No.Botanical Name
(Syn./Eng./Arb. Names)
FormLife FormLife CycleEconomic ValueFolk MedicineReferences
1Anthemis odontostephana Boiss.
(Arb. O’qhowan)
HThAArom, EOs * [52,186,187]
2Artemisia sieberi Besser (Eng. Wormwood)H/SChPMed, Arom, Eos *, Flav!, Cosm!(+) (UAE)[188]
3Calendula arvensis L. (Eng. Field marigold)
(Arb. Ain el baqr, eqhwan-asfar, hanwa, hanuwa)
HThAMed, Fod, Nutr, EOs, Cosm(+)[54,189]
4Cichorium intybus L. (Eng. Blue daisy, blue dandelion, blue sailors, blue weed, bunk, coffeeweed) (Arb. hindibaa bareeya, chicoria) HChPMed, Flav, Forg, EOs, Lands(+) (Europe: “R”: Are aromatic and used with coffee as a substitute) (UAE: “L”: Boiled in water as fever treatment + “Fr”: Eaten to treat headache and boiled in water for treating jaundice)[55,190]
5Conyza bonariensis (L.) Cronq.
(Syn. Conyza linifolia (Willd.) Tackh) (Eng. Flax-leaf Fleabane, Wavy-leaf Fleabane, hairy fleabane)
(Arb. hashishat el-jebal, tebaq)
H/WThA/B/PMed,
EOs
(+)[191,192]
6Eclipta prostrata L. (Syn. Eclipta alba (L.) Hassk.) (Eng. False daisy, Trailing eclipta )
(Arb. Sa’ada, sauweid, masadate)
H/WThAMed, Arom, EOs(+) (China: Herbal medicine) (North Africa: Juice of fresh plant applied to scalp to improve hair growth)[57]
7Grantia aucheri Boiss.HHeAMed, EOs(+) (Pakistan: “W”: for snake and scorpion bite)[58,193]
8Launaea nudicaulis (L.) Hook. f. (Eng. Hawwa Baqrah ara, hindabah ara, huwah ara, naked launea) (Arb. Huwah al ghazal, safara, huwah, hindabah) HChA/PMed, EOs(+)[59,60]
9Matricaria aurea (Loefl.) Sch. Bip.
(Eng. Golden chamomile) (Arb. Babunaj)
HThAMed, Arom *, Eos *, Cosm *(+) (As a carminative and anti-inflammatory) (Used in ointments and lotions) (As a mouthwash against infections of mouth and gums) (chamomile essential oils “true chamomile oil”: for aromatherapy) (UAE: Medicinal tea. “Fl”: To treat abdominal complains)[194]
10Matricaria chamomilla L. (Syn. Matricaria recutita) (Eng. Chamomile, camomile, german chamomile) HThAMed, Nutr, Arom, Eos *(+) (Saudi Arabia: “Fl”: as antibacterial) (Jordan: to treat various diseases “e.g., inflammation and cancer”)[107,195]
11Pluchea arabica (Boiss.) Qaiser and Lack
(Eng. Pluchea) (Arb. godot)
HChPMed, Arom, Eos *, Cosm(+) (UAE: To treat skin and as doedorant) (“W”: Boiled to treat skin ailments + “L”: Extract used as ear drops + “L”: Fresh “L” rubbed on body as deodorant)[64,66]
12Pluchea dioscoridis (L.) DC. (Syn. Conyza dioscoridis (L.) Desf., Baccharis dioscoridis L.)
(Eng. Ploughmans spikenard, marsh fleabane)
(Arb. Sahikee, barnof)
S/TChPMed *, Arom, EOs(+) (Many Important Applications) (UAE)[65,66]
13Pluchea ovalis (pers.) DC.
(Eng. Woolly camphor-weed)
S/TPhA/PMed *, Arom, EOs(+) (UAE)[66]
14Pseudognaphalium luteo-album (L.) H. and B. (Syn. Gnaphalium luteo-album L.) (Eng. Cudweed)
(Arb. sabount el’afrit)
F/HThAEOs(+)[67]
15Pulicaria arabica (L.) Cass. (Syn. Inula arabica L./Pulicaria elata Boiss./Pulicaria laniceps Bornm.) (Arb. Iqat, abu ‘ain safra)HHeA/PEOs.[7]
16Pulicaria glutinosa Jaub. and Spach (Arb. Thal, fal, shajarat fal, muhayda, mithidi, shajarat al-mithidi, shneena, zayyan) SChPArom *, EOs, Oth * [7]
17Pulicaria inuloides (Poir.) DC.SChPMed, Fod, Forg, Arom, EOs, Fuel(+)[69,70,71]
18Pulicaria undulata (L.) C.A. Meyer (Syn. Pulicaria crispa (Forssk.) Benth.) (Eng. Crisp-leaved fleabane) (Arb. Gathgeth, jithjath, ‘urayfijan) H/SChA/PMed *, Fod, Forg, Arom, Eos *, Fuel(+) (Dropsy, swelling, edema, gout, febrifuges, painkillers) (Egypt: To treat measles and repel insects)[196]
19Rhanterium epapposum Oliv. (Eng. Rhanterium) (Arb. Arfaj) SChpForg *, Flav, EOs, Fuel [197]
20Senecio glaucus L. ssp. coronopifolius (Maire) Al. (Syn. Senecio desfontanei Druce) (Eng. Maire alexander, buck’s horn groundsel) (Arb. Qorreis, murair, zamlooq, shakhees, rejel al ghurab) HThAArom, Eos * [198]
21Seriphidium herba-alba (Asso) Sojak (Syn. Artemisia herba-alba Asso/Artemisia inculta Del) (Eng. Wormwood, white wormwood) (Arb. Ata, ghata, shih) SPhPMed, Eos *, FPre!(+) (Tunisia) (Inhaling smoke thought to be beneficial for both man and animals) (“Sh”: Young “Sh” eaten by mountain travellers) (Many applications) (UAE: “L”: Crushed as a worm treatment and to combat fevers + Many applications)[76]
22Sphagneticola trilobata (Syn. Wedelia paludosa DC.) (Eng. Singapore daisy, creeping-oxeye, trailing daisy, wedelia)HChPMed, EOs, Lands *(+) (Brazil)[75,77]
Table 3. The UAE EO-bearing species of Fabaceae/Leguminosae/Papilionoideae Family.
Table 3. The UAE EO-bearing species of Fabaceae/Leguminosae/Papilionoideae Family.
No.Botanical Name
(Syn./Eng./Arb. Names)
FormLife FormLife CycleEconomic ValueFolk MedicineReferences
1Alhagi maurorum Medik. (Syn. Alhagi graecorum Boiss.) (Eng. Camelthorn, camelthorn-bush, caspian manna, persian mannaplant) (Arb. Shwaika, agool, heidj) H/SHe/NaPMed,
EOs, Biof
(+) (Infusion of plant or plant juice used to treat worm infestations, cataract, jaundicem migraine, arthritis, constipation) (“R”: Green “R” boiled and taken as tea with lime, as an aphrodisiac and to treat kidney disease) (UAE)[113]
2Lotus halophilus Boiss. and Spruner (Eng. Greater bird’s foot trefoi) (Arb. Horbeith “hurbuth”, garn al ghazal, ‘asheb al ghanem) V!/HThA/PMed, Fod, Forg, EOs, Lands(+) (Qatar: as tonic and sedative)[79,89]
3Medicago polymorpha L. (Eng. California burclover, toothed bur clover, toothed medick, burr medic) F/WThAMed *, Fod, Forg, EOs, Eco, Lands(+) (India: for medicinal purposes for skin plagues and dysentery) (Bolivia: for medicinal purposes since 16 century) (Italy: for treating rheumatic pains, wounds and still used until today)[115]
4Medicago sativa L. (Eng. Alfalfa, lucerne) HHePMed *, Forg *, EOs, Eco(+) (Great therapeutic benefits) (Used for boosting energy levels)[116]
5Rhynchosia minima (L.) DC. (Eng. least snout-bean, burn-mouth-vine and jumby bean) (Arb. Baql)V/HChPMed, EOs(+) (Saudi Arabia: Used as abortive) (UAE)[116,117]
6Tephrosia persica Boiss. (Syn. Tephrosia apollinea (Delile) DC.) (Arb. Dhafra, omayye, nafal)H/SChPMed, Arom, Eos *(+) (“L”: Boiled with water used as eardrops for earache + “Bk”: Powdered and mixed with water put into camel’s ears to remove ticks + “L”: Powdered, heated and mixed as a paste with water and/or salt and applied on wounds and fractures to relieve pain) (UAE)[118]
7Trigonella hamosa L. (Eng. Branched fenugreek, egyptian fenugreek) (Arb. Nafal, qutifa, qirqas, darjal, eshb al-malik, qurt) H ThAMed, Forg, Flav, EOs(+)[79]
8Ononis sicula Guss.HThAEOs.[119]
9Acacia nilotica (L.) Delile (Syn. Acacia Arabica (Lam.) Willd.) (Eng. Gum arabic tree, babul/kikar, egyptian thorn, sant tree, al-sant, prickly acacia)
(Arb. Sunt garath “kurut”, babul, tulh. Fruit: karat)
TPhPMed *, EOs, Lands(+) (Pearl drivers used to apply an infusion of fruits to skin after dives) (“L”: Poultice of “L” used to treat joint pains) (Resin mixed with egg-white applied to eyes to treat cararacts) (“L”: Eaten to treat diarrhoea) (“Se”: Soaked in water or milk drunk to treat diabetes) (“Pd”: Smoke from burning “Pds” inhaled for colds) (UAE: Applied to soothe burns. “L”: are pounded into a paste and used a poultice on boils and swellings or applied around boils to draw out the pus)[120]
10Acacia tortilis (Forssk.) Hayne (Eng. Umbrella thorn) (Arb. Samr “samur”, salam) S/TPhPMed, Forg, EOs(+) (Mostly yields resin, used as a gum to heal wounds)[122]
11Prosopis farcta (Banks and Sol.) Mac.
(Eng. Dwarf mesquite, syrian mesquite)
(Arb. Yanbut, agoul, awsaj)
SChPEOs.[123,128]
Table 4. The UAE EO-bearing species of Lamiaceae/Labiatae.
Table 4. The UAE EO-bearing species of Lamiaceae/Labiatae.
No.Botanical Name
(Syn./Eng./Arb. Names)
FormLife FormLife CycleEconomic ValueFolk MedicineReferences
1Lallemantia royleana (Benth.) Benth.
(Eng. Bian bing cao)
HThAMed *, Eos *(+)[128]
2Mentha spicata (Eng. Spearmint, spear mint)HHePMed, Fod, Flav, Arom *, Eos *(+) (UAE)[199]
3Ocimum forsskaolii Benth.
(Syn. Ocimum forskolei Benth.) (Eng. Rehan, sawma)
(Arb. Basil)
HThA/PMed *, Arom, EOs, Insec, Lands, Oth(+) (Oman: “L”: as deodorant + “L”: Fragnance eases headaches and dizziness + “L”: Crushed and placed in nose to treat colds and in ears to treat earaches + “L”: Juice from young “L” as eye drops or to soothe insect bites) (UAE: “L”: to treat vomiting, against itching)[69,131]
4Salvia aegyptiaca L. (Eng. Egyptian sage) (Arb. Ra’al, na’aim, ghbeisha, shajarat al ghazal, khizam) HCh/ThA/PMed *, Eos *(+) (To treat diarrhoea, gonorrhoea and haemorrhoids) (As demulcent, antispasmodic, cicatrizant, antiseptic and stomachic) (Its non-polar extracts have been tested as antimicrobial) (Nutlets are used in a drink to treat diarrhoea and piles) (UAE)[2]
5Salvia macilenta Boiss. (Eng. Khizama)
(Arb. Khmayzah lethnay, bithman)
HChPMed, Eos *(+)[3]
6Salvia macrosiphon Boiss. (Arb. Shajarat Al Ghazal) HHePMed, Eos *(+)[140,141]
7Salvia mirzayanii Rech.f. and EsfandiariHChPEOs.[200]
8Salvia spinosa L. (Arb. Shajarat al-ghazal)HHePEos *.[136]
9Teucrium polium L. (Eng. Felty germander)H/SThPMed *, Arom, EOs(+) (to treat liver diseases, antispasmodic, antidiabetic and lowering blood lipid) (Many medicinal uses: to treat malaria, insect bites and abscesses) (UAE: “L” and “St”)[137]
10Teucrium stocksianum Boiss. (Eng. Jadah, yadah, Ja‘adah) (Arb. Ya’dah, brair) HChPMed *, Eos *(+) (Many applications in medicine) (Antispasmodic activity) (UAE: Many medicinal applications. Antispasmodic activity. To treat kidney, stomach pains, thyroids problems, common cold)[6]
11Zataria multiflora Boiss. (Eng. Za’atar, shirazi thyme) HChPMed, Flav, Arom, Eos *(+) (UAE: to treat cold, indigestion, toothache)[141]
Table 5. Location of the UAE EO-bearing plants of Asteraceae/Compositae/Anthemideae.
Table 5. Location of the UAE EO-bearing plants of Asteraceae/Compositae/Anthemideae.
No.Botanical Name EmiratesImportant LocationsSoilHabitatsFloweringWildlife Status
(Past) vs. (Present)
References
1Anthemis odontostephana Boiss.(RAK, F) (RA)(Sil, Roc) (Mou)Feb. to Apr.(NC) (CO)[15,21]
2Artemisia sieberi Besser.....(CO)[28]
3Calendula arvensis L.(RAK, F, S)(HM, RA)(Sil, Roc)(FF, Mou) Jan. to Mar. June to Nov.(CO) (NC, CO) [15,21]
4Cichorium intybus L.(RAK).(San) (FF)Feb. to Apr.(CO, RA) (RA) [15,21,28]
5Conyza bonariensis (L.) Cronq.(AD)(SL).(Oas, Gar, Plat)Jan. to May.(CO)[21,22]
6Eclipta prostrata L.(F)(SL).(Plat)Dec. to Apr.(NC) (NC)[15,21]
7Grantia aucheri Boiss.(AD)(Ain).(Rod, Wad)Jan. to Apr..[27]
8Launaea nudicaulis (L.) Hook. f. (AD, Du)(SL)(San) (Oas, Plat)Feb. to Apr.(CO) (NC) [15,21,22]
9Matricaria aurea (Loefl.) Sch. Bip.(RAK, F)(RA)(Sil, Roc)(PX, Mou)Feb. to Apr.(CO) (CO)[21,28]
10Matricaria chamomilla L....(Rod!, AF!)..[63]
11Pluchea arabica (Boiss.) Qaiser and Lack(RAK).(Roc)(Wad, Plat, Wat) Feb. to Apr.(NE) (RA) [28]
12Pluchea dioscoridis (L.) DC..(WC)(San, Sal)(Cos, Oas, Gar, Urb, AF)Through the year.(CO) (CO)[15,21,22]
13Pluchea ovalis (pers.) DC.(Du)....(NC)[15,21]
14Pseudognaphalium luteo-album (L.) H. and B.(AD)(Ain).(Plat)Feb. to May.(CO)[21,22]
15Pulicaria arabica (L.) Cass.(S, F, RAK)(HM).(Wad, Wat, Plat)Feb. to Apr.(NC, CO) (NC, CO) [21]
16Pulicaria glutinosa Jaub. and Spach(F, RAK, S, AD)(HM)(Roc)(Plat, Mou)Feb. to Jun.(CO) (CO)[15,21,22]
17Pulicaria inuloides (Poir.) DC.......[21]
18Pulicaria undulata (L.) C.A. Meyer (RAK, AD) (SL)(San, Sil) (Apl, AF)Apr. to Jul. Mar. to Aug.! Mar. to June!(FC) (FC)[15,21,22]
19Rhanterium epapposum Oliv. (AD) (Ain, CC, EE, NE)(San, Roc) (Dun, Plat, Apl, Hil) Jan. to May.(CO)[15,21,22]
20Senecio glaucus L. ssp. coronopifolius (Maire) Al. (RAK, UAQ, AD)(CN)(San, Sal) (Cos, FF)Feb. to Apr.(CO) (CO)[15,21,22]
21Seriphidium herba-alba (Asso) Sojak (RAK, F)(RA)(Roc) (PX, Mou)Feb. to Apr.(NC) (CO) [21]
22Sphagneticola trilobata....Through the year. Spring to Autumn!.[15]
Table 6. Location of the UAE EO-bearing plants of Fabaceae/Leguminosae/Papilionoideae.
Table 6. Location of the UAE EO-bearing plants of Fabaceae/Leguminosae/Papilionoideae.
No.Botanical Name EmiratesImportant LocationsSoilHabitatsFloweringWildlife Status
(Past) vs. (Present)
References
1Alhagi maurorum Medik. (AD)(SL)(Sal!) (Cos, Dun, Rod, DS)!Mar. to Aug. Apr. to Jul!(CO) (CO)[15,24]
2Lotus halophilus Boiss. and Spruner (AD, RAK)(WC)(San, Sal) (Cos, Dun).(NC) (CO)[15,21,22]
3Medicago polymorpha L. (Du, AD)(SL)(Roc)! (Gar, Plat, Mou, DS)!Feb. to Apr.!(CO)![15,21,22]
4Medicago sativa L. (Du)....(NC)[15]
5Rhynchosia minima (L.) DC. (AD)(NE)(San, Roc) (Dun, Wad, Mou)Feb. to May.(LC)[15,21,22]
6Tephrosia persica Boiss. (F, S, RAK) (RA, HM)(San, Roc) (Wad, Mou “low”)Jan. to May.(NC) (CO)[15,21]
7Trigonella hamosa L. (Du, AD)(SL)(San) (Dun, Oas, Gar, Plat)Feb. to Apr.(FC) (NC) [15,21,22]
8Ononis sicula Guss.......[21]
9Acacia nilotica (L.) Delile (AD)(EE, NE)(Roc) (Oas, Wad, Plat, Gar, Mou) Mar. to Nov.
Nov. to Apr.!
(CO) (CO)[15,21,22,28]
10Acacia tortilis (Forssk.) Hayne (AD, S)(EE)(San, Roc) (Pla, Dun. Wad, Mou “medium elevations”)Apr. to Jun. Mar. to July!(FC) (CO) [15,21,22]
11Prosopis farcta (Banks and Sol.) Mac.(AD) (Ain, SL)(San, Roc)(Dun, Plat, Mou)Apr to Aug. Apr to July!(NC) (RA) [15,21,22]
Table 7. Location of the UAE EO-bearing plants of Lamiaceae/Labiatae.
Table 7. Location of the UAE EO-bearing plants of Lamiaceae/Labiatae.
No.Botanical Name EmiratesImportant LocationsSoilHabitatsFloweringWildlife Status
(Past) vs. (Present)
References
1Lallemantia royleana (Benth.) Benth. (RAK, F)(RA)(Roc)(Mou “medium and high elevations”)Feb. to Apr.(RA)[21]
2Mentha spicata......[63,130]
3Ocimum forsskaolii Benth.(S, F, RAK) (HM, RA).(Plat)Feb. to Apr.(NE) (NC)[15,21,28]
4Salvia aegyptiaca L. (AD, S, F, RAK) (HM)(Roc)(Wad, Hil “all elevations”, Mou)Feb. to May.(CO) (CO)[15,21,22,24,28]
5Salvia macilenta Boiss. (F, RAK, AD) (EE)(Roc)(Plat, Wad, Hil “low”, Mou)Feb. to May.(CO) (NC, CO)[15,21,22]
6Salvia macrosiphon Boiss. (F, S !, RAK!) (RA! HM!)(Roc) (Wad, Hil, Mou)Feb. to May.(RA)[15,21]
7Salvia mirzayanii Rech.f. and Esfandiari(F, RAK) (RA)(Roc) (Wad, Hil “low”, Mou)Feb to May!(NC)![21]
8Salvia spinosa L. (AD, S, F, RAK)(HM, RA)(Roc) (Rod, Wad, Hil “low to medium elevations”, Mou)Feb. to Apr.!(NC, CO)[21,22]
9Teucrium polium L. (F, RAK)(RA).(Wad, Hil “all elevations”)!Feb. to May.!(NE) (RA)![21,28]
10Teucrium stocksianum Boiss. (F, S, RAK, AD) (HM, RA, KF)(Roc) (Wad, Hil “all elevations”, Mou)Mar. to Apr.! Feb. to May.(CO) (NC, CO)[15,21,22,24,28]
11Zataria multiflora Boiss. ......[24]
Table 8. Details of EOs isolated from species of Asteraceae/Compositae/Anthemideae.
Table 8. Details of EOs isolated from species of Asteraceae/Compositae/Anthemideae.
No.Botanical Name Plant PartPhysical PropertiesYield
(%)
Isolation MethodMain Chemical Groups/ComponentsBiological ActivityReferences
1Anthemis odontostephana Boiss.Fl/L/St/R(Yellow color/Aromatic odor)Fl,HD(0.2) Fl,HD (0.7) Fl,HD (0.5)L,HD (0.7) St,HD (0.2) R,HD HD(Monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, oxygenated sesquiterpenes, phenylpropanoids)Fl,HD
(Spathulenol, hexadecanoic acid, germacrene D, 1,8-cineole, 6-methyl-5-hepten-2-one, caryophyllene oxide, β-caryophyllene, camphor) Fl,HD
(Borneol) Fl/L/St,HD
(Pentadecanoic acid)R,HD
[AB/AF/AM]Fl/L/St/R,HD
(AB: Gram-negative bacteria: Escherichia coli, Escherichia coli, Klebsiella bacteria. Gram-positive bacteria: Staphylococcus aureus, Staphylococcus epidermidis, Corynebacterium glutamicum)Fl/L/St/R,HD
(AF: Aspergillus niger, Fusarium solani species complex, Alternaria alternata)Fl/L/St/R,HD
[52,186,187]
2Artemisia sieberi BesserL/ShFresh herbaceous, camphoraceous, earthy odor with a fruity and dried plum-like background(1.7)Sh,HD (1.02)Sh,SD (0.5 to 3.5)Sh,HD (1.6 to 14.0)Sh,SFE HD/SD/SFE (Sesquiterpenes: dehydro-1,8-sesquicineole)Sh
(camphor, camphene, 1,8-cineol, β-thujone, α-pinene)Sh,HD
(camphor, 1,8-Cineol)Sh,SFE
(α- thujone, β- thujone, camphor) (camphor, 1,8-cineole, bornyl acetate, neryl acetate)Sh,SD
(camphene, 1, 8-cineole, trans-thujone, camphor, borneol)Sh,HD
(camphor, 1,8-cineole, bornyl acetate)Sh,SD
(camphor, camphene, 1,8-cineol, β-thujone, α-pinene)L,HD
(camphor, 1,8-cineole, camphene, terpinen-4-ol, α-terpineol, dehydro-1,8-sesquicineole)Sh
(ketone, 1, 8 cineole, selin-11-en-4-a-ol, lavandulon)Sh
(1,8cineol, myrcene, 1,8cineol, Eudesm-7(11)-en-4-ol, 4-tepinyl acetate, davanone, p-cymene)
[AB/AF/AM/FT/AD]
(AB: Gram-positive bacteria, Gram-negative bacteria)
(AM: yeast and fungi)
(AM: Gram-positive bacilli: Listeria monocytogenes, Bacillus cereus. Gram-positive cocci: Streptococcus mutans)
(AB: Pseudomonas aeroginosa, Staphylococcus aureus, Escherichia coli)Sh
(FT against insects: Callosobruchus maculatus, Sitophilus oryzae, Tribolium castaneum) L,HD
(AF: for patient with Pityriasis versicolor)
[188]
3Calendula arvensis L.Sh.(0.02 to 0.06)Sh,HDHD(γ-cadinene, α-cadinol)Sh,HD.[54,189]
4Cichorium intybus L.Sh/Fl(Yellow color/Strong odor)Sh, HD.HD(carvacrol, thymol, cinnamic aldehyde, camphor, carvone, linalool, α-terpineol)Sh,HD.[55,190]
5Conyza bonariensis (L.) Cronq.W/Sh/Fl.(0.22)W, SDHD/SD(Sesquiterpenes)HD
(Monoterpenes, acetylenes, sesquiterpenes, diterpenes)W,SD
(matricaria methyl ester, limonene, manool, carvone)W,SD
((E)-β-farnesene, germacrene D, β-caryophyllene, limonene)HD
(matricaria ester, (Z)-nerolidol, caryophyllene oxide)Sh (matricaria ester, caryophyllene oxide, (E)-β-farnesene)Sh (matricaria ester, geranyl acetone, trans-α-bergamotene, limonene)Sh
[AB/AF/AM/IS]HD[191,192]
6Eclipta prostrata L.L/St/Fl/Sh(Yellow color)Sh, HD(0.1)Sh,HDHD(Sesquiteprenoids, straight chain hydrocarbons, monoterpenoids, P-caryophyllene, a-humulene) (hydrocarbons with sesquiterpene predominating, alcohols, ketones, aldehydes, oxides, esters)Sh,HD
(α-Humulene, 6,9-heptadecadiene, (E)-β-farnesene, α-phellandrene)Sh,HD (sesquiterpenoids)L
(sesquiteprenoids, straight chain, hydrocarbons, monoterpenoids)St
(P-caryophyllene)L
(a-humulene, (E)-beta-farnesene)St
.[57]
7Grantia aucheri Boiss.Sh.(0.53)Sh,HDHD(Sesquiterpenes: himachalol)Sh,HD.[58,193]
8Launaea nudicaulis (L.) Hook. f. Sh..SD(limonene, Z-citral, E-citral)Sh,SD[AB/AM]
(AB: Gram-positive bacteria: Staphylococcus aureus. Gram-negative bacteria: Escherichia coli)Sh,SD
[59,60]
9Matricaria aurea (Loefl.) Sch. Bip. Fl.(0.63)Fl,HDHD(α-bisabolene oxide A, α-bisabolol oxide A, chamazolene)Fl,HD.[194]
10Matricaria chamomilla L. Sh/Fl(Dark blue color/Strong characteristic odor)Fl,HD(0.626 to 0.754)Fl,HD (0.25)Fl,SD (0.73)Fl,HD (4.33)Fl,SFEHD/SD/SDE/SFE(azulene-7-ethyl-1,4-dimethyl, limonene, bisabolol oxides A and B, bisabolone oxide, trans-β-farnesen, isobornyl isobutyrate<8-isobutyryloxy>)Fl,HD
(α-bisabolol, trans-trans-farnesol, cis-β-farnesene, guaiazulene, α-cubebene, α-bisabolol oxide A, chamazulene)Fl,SD (Guaiazulene, (E)-β-faranesens, chamazulene, α-bisabolol oxide B, α-bisabolol, hexadecanole)Fl,HD
(Trans-anethole, estragole, fenchone, limonene)Fl,HD
((-)-α-bisabolol, chamazulene, (-)-α-bisabololoxides)Fl (chamazulene, cis-spiroether, trans-spiroether)Fl,SD
(α-bisabolol oxide A and B, (E)-β-farnesene, α-bisabolol, chamazulene)Fl,HD
(Sesquiterpenoid)Fl,SDE
(Bisabolol oxide, bisabolon oxide, β-farnesense, α-bisabolol, chamazulene and en-yn-dicycloether)Fl,SDE
(bisabolol oxide A, α-bisabolol, bisabolol oxide B, cis-enyne-bicycloether, bisabolon oxide A, chamazulene, spathulenol, (E)-β-farnesene)
(β-farnesene, α-farnesene, γ-cadinene, α-bisabolol oxide B, α-bisabolol, chamazulene, α-bisabolol oxide A, cis, trans-dicycloether)Fl,SFE
((E)-β-farnesene, guaiazulene, α-bisabolol oxide A, α-farnesene, α-bisabolol)Sh
[AB/AF/AM/AO/AS]
(AF: Aspergillus niger)Fl,SD
(AB: Streptoccus pygenes, Streptococcus mutans, Streptococcus salivarius, Streptococcus faecalis, Streptococcus sanguis)Fl,HD
(AM: Aspergillus flavus, Candida albicans, Bacillus cereus, Staphylococcus aureus)Fl,HD
[107,195]
11Pluchea arabica (Boiss.) Qaiser and LackSh/Fl.(0.08)Sh,SDSD(Sesquiterpene)Sh,SD
(δ-cadinol, 9-(1-methylethylidene)-bicyclo[6.1.0]nonane, caryophyllene oxide, methyleugenol, β-caryophyllene)Sh,SD
(godotol A and godotol B)
[AB/AM]
(AB: Staphylococcus aureus, Candida albicans, Bacillus subtilis)Sh,SD
[64,66]
12Pluchea dioscoridis (L.) DC. L..HD(Monoterpenes, light oxygenated compounds, sesquiterpenes, heavy oxygenated compounds)L,HD (Farnesol cis-trans, farnesol, nuciferol, trans-cadinol, eudesmol, methyl eicosane)L,HD (Farnesol,
uiterpene alcohols, oxygenated sesquiterpenes, sesquiterpene hydrocarbons)
[AO/AB/AM]!L!,HD!
(AB: Gram-positive bacteria; Gram-negative bacteria)!L!,HD!
(AM: Mycotic infection with C. albicans)!L!,HD!
[65,66]
13Pluchea ovalis (pers.) DC. L .(0.02)L,SDSD (limonene, p-cymene, ß-maaliene, ß-phellandrene, isocomene Laggera aurita, 2,5-dimetoxy-p-cymene, ß-caryophyllene, δ-cadinene, α-cadinol)L,SD.[66]
14Pseudognaphalium luteo-album (L.) H. and B. Sh!..MD(Monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, oxygenated sesquiterpenes, liphatic compounds, fatty acids, esters)Sh!,Microdistillation! (decanal, β-caryophyllene, α-gurjunene)Sh!,Microdistillation!.[67]
15Pulicaria arabica (L.) Cass. Sh..SD(Sesquiterpene hydrocarbons, alcohols)Sh,SD [7]
16Pulicaria glutinosa Jaub. and SpachSh/Fl.(0.5)Sh,SDSD(sesquiterpenes)Sh,SD (p-elemene, 7-cadinol, a-cadinol)Sh,SD [7,197]
17Pulicaria inuloides (Poir.) DC.L/Sh/W(Strong odor)W, HD(0.5)W,HDHD/SD(2-Cyclohexen-1-one, 2-methyl-5-(1-methyl), Benzene, methyl-, Z.citol)L,HD (2-Cyclohexen-1-one, 2-methyl-5-(1-methyl) with Hexadecanoic acid (CAS), Ethane, 1,2-diethoxy)W,HD (2-cyclohexen-1-one, 2-methyl-5-(1-methyl), benzene, methyl-)Sh,SD[AB/AM]Sh,HD!/SD!
(AB: G+: Staphylococcus aureus, Streptococcus pneumoniae, Bacillus subtilis; G-: Escherichia coli)Sh,HD!/SD!
(AM: against yeast: Candida albicans)Sh,HD!/SD!
[69,70,71]
18Pulicaria undulata (L.) C.A. Meyer Sh.(2.5)Sh,SD (0.32)Sh,HDHD/SD(Phenolic compounds, monoterpene hydrocarbons, low in sesquiterpene hydrocarbons)Sh,SD (oxygenated monoterpenes:carvotanacetone. Sesquiterpene lactone, δ-cadinene, α-elemene, sabinol) (1,8-cineole)Sh,HD ((+)-carvotanacetone)Sh,SDAB!/R![196]
19Rhanterium epapposum Oliv. Sh!/Fl!.0.25!HD!(Terpenoids, Non-terpenoid aliphatic and aromatic structures) (terpenoids: α-phellandrene, linalol, geraniol, bulnesol) (α-phellandrene, linalol, geraniol, bulnesol, β-phellandrene).[197]
20Senecio glaucus L. ssp. coronopifolius (Maire) Al. Sh!/Fl!/Fr!(Apricot-like odor “while the odor of the intact plant is herbaceous, spicy and floral fruity”)SD/H.SD/H(Monoterpenes,Sesquiterpenes)SD/H (myrcene, dehydrofukinone)SD/H.[198]
21Seriphidium herba-alba (Asso) Sojak L/Fl/Sh(Yellow color)L/Fl,HD(1.45)L/Fl, HDHD(Oxygenated monoterpenes, oxygenated sesquiterpenes)L/Fl,HD
(cis-chrysantenyl acetate, the sabinyl acetate and the α-thujone)L/Fl,HD
[AB/AF/AM]Sh,HD
[AO/AM]L/Fl,HD
(AM: S. typhimurium, E. coli, K. pneumoniae, P. aeruginosa, E. faecalis, B. cereus, F. solani, A. oxysporum)L/Fl,HD
[76]
22Sphagneticola trilobataL/St/Fl/Sh.(0.48 to 0.78)Sh, HD (0.18 to 0.25)Sh, HD (0.09)HD/SD(Hydrocarbon sesquiterpenes, hydrocarbon monoterpenes, low levels of oxygenated sesquiterpenes)Sh,HD
(α-pinene, β-pinene, limonene, γ-muurolene)L
(germacrene D, α-phellandrene, α-pinene, E-caryophyllene, bicyclogermacrene, limonene, α-humulene)Sh,HD
(α-pinene, α-phellandrene, sabinene, limonene, β-pinene, camphene, 10-nor-calamenen-10-one, germacrene D, γ-amorphene)Sh,HD
.[75,77]
Table 9. Details of EOs isolated from species of Fabaceae/Leguminosae/Papilionoideae.
Table 9. Details of EOs isolated from species of Fabaceae/Leguminosae/Papilionoideae.
No.Botanical Name Plant PartPhysical PropertiesYield
(%)
Isolation MethodMain Chemical Groups/ComponentsBiological ActivityReferences
1Alhagi maurorum Medik. L/St ..DSD(Ketones, acid derivatives, terpenoids, hydrocarbons)L/St,DSD
(heterocyclics compunds)L,DSD (drimenol, 9-octylleptadecane, 4-hexyl-2,5-dioxo-3-furanacetic acid, 2-nonadecanone, pentacosane)L,DSD
(Aldehydes)St,DSD (neophytadiene,trans-b-ionone, 6,10,14-trimethyl-2-pentadecanone, actinidiolide, nonacosane)St,DSD
(drimenol, octadecane, eicosane, docosane, tetracosane, squalene)L/St,DSD
.[113]
2Lotus halophilus Boiss. and Spruner Sh(Yellow color)Sh,SD(0.07 “fresh weight basis”)Sh,SDSD(phytol, Heptadecane, 2,9-Dimethyldecane)Sh,SD.[79,89]
3Medicago polymorpha L. ..(0.5)HDHD(Terpenoids, alcohols, ketones, aldehydes, esters, hydrocarbons, high amount of fatty acids, benzene compounds)HD
(Undecanoic acid, 2-dodecanone, hexadecanoic acid, oleic acid, tetracosane)HD
.[115]
4Medicago sativa L. Fl..TT(Alcohols, esters, ketones, terpenes, furanoids)Fl,TT
(Trans-2-hexenal)Fl,TT
.[116]
5Rhynchosia minima (L.) DC. L.(0.18)L,SDSD(isopropyl toluene, O-cymene, camphene, limonene, 2- β-pinene, α-terpinolene, α-pinene, myrcene)L,SD[AB] [AB/AF/AM/AO]L,SD (AB: A. calcoaceticus, B. subtilis, C. freundii, C. sporogenes, Escherichia coli, P. vulgaris, P. aeruginosa, S. typhii, Staphylococcus aureus, Y. enterocolitica)L,SD (AF: Candida albicans, A. niger, A. flavus, P. notatum)L,SD[116,117]
6Tephrosia persica Boiss.L /St.(0.05 “fresh weight basis”)L/St,HDHD(Sesquiterpenoids, monoterpenoids)L/St,HD
(germacrene D, spathulenol, caryophyllene oxide, trans-β-caryophyllene)L,HD
(germacrene D, geyrene, trans-β-caryophyllene, spathulenol, caryophyllene oxide)St,HD
(AM/IS)![118]
7Trigonella hamosa L.Sh(Yellow color)Sh,SD(0.04 “on fresh weight basis”)Sh,SDSD or HD!(Palmitic acid, tetradecanoic acid, linolenic acid methyl ester, phytol, decanoic acid)Sh,SD.[79]
8Ononis sicula Guss.....(Oxygenated sesquiterpenes, sesquiterpene hydrocarbons) (sesquiterpene hydrocarbons: selin-11-en-4-α-ol, α-selinene)[AO][119]
9Acacia nilotica (L.) DelileSt/Pd/Bk.(0.08)St,HD (4.56)Pd,SFE(4.86,5.05)Bk,SFEHD/SFE(Monoterpenoid compounds, sesquiterpenes)St,HD
(Monoterpenoid compounds: menthol, limonene. α-Curcumene, carvacrol)St,HD
[AB/AF/AM]
(AB: Bacillus subtilis)Pd!/Bk!,SFE
(AF: Ganoderma lucidum)Pd!/Bk!,SFE
[120]
10Acacia tortilis (Forssk.) Hayne L(Yellow–green color)L,GC-FID(0.12)L,GC-FIDGC-FID(Monoterpenes, rich sesquiterpenoid compounds)L,GC-FID
(α-humulene, α-cadinol, nerolidol, γ-cadinene, 2-(E)-octenal)L,GC-FID
.[122]
11Prosopis farcta (Banks and Sol.) Mac.St/Pd/L/Fl/Se/R/W(Pleasant odor)W,SD(0.00472 to 0.00793)W, SDSD(Saturated hydrocarbons, unsaturated hydrocarbons, aldehydes, carboxylic acids)Sh,SD
(Heneicosane, 6,10,14-Trimethylpentadecan-2-one, Docosane, 2-Methyl-1-tertiobutilprop-1,3-yl-, D-Limonene, Methyl hexadecanoate)St,SD (Phytol, Benzyl benzoate, 3-Hydroxy-beta-damascone)L,SD
(Phytol, Tetradeca-1,13-diene, Eicosane)Fl,SD
(Methyl octadec-9-enoate, Phytol, Methyl hexadecanoate)Pd,SD
(Octadecanal, Hexadecanal, Heptadeca-1, 11,13-triene)R,SD
.[122,128]
Table 10. Details of EOs isolated from species of Lamiaceae/Labiatae.
Table 10. Details of EOs isolated from species of Lamiaceae/Labiatae.
No.Botanical Name Plant PartPhysical PropertiesYield
(%)
Isolation MethodMain Chemical Groups/ComponentsBiological ActivityReferences
1Lallemantia royleana (Benth.) Benth. L/St/Fl/Sh..HD(trans-pinocarvyl acetate, pinocarvone, β-pinene, (E)-β-ocimene, terpinolene, linalool, trans- pinocarveol, 3-thujen-2-one, myrtenal, verbenone, trans-carveol, cis-carveol, pulegone, carvacrol, dihydrocarvyl acetate, β-cubebene)Sh,HD[ AB/AF/AM]Sh,HD
(AB: Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumoniae)Sh,HD (AF: Candida albicans, Aspergillus niger)Sh,HD
[128]
2Mentha spicataL/Sh(Light green color)L,HD(0.53)Sh,HD (0.566 ± 0.02 “on fresh weight basis”)L,HD (1.2)Sh,HD!orSD! (0.1 to 1.8)Sh!orL! (0.9)Sh,SD (0.32)Sh,SD SFE HD/SD/SFE (Oxygenated, non-oxygenated monoterpenes, sesquiterpenes)SD (carvacrol, thymol)
(Carvone, Trans carveol)Sh,HD
(piperitone oxide, piperitenone oxide, carvone, dihydrocarvone)L,HD
(carvone, limonene, 1,8-cineole, trans-carveol)L,HD
(carvone, cis-carveol, limonene, 1,8 cineol, cis-dihydrocarvone, carvyl acetate, cis-sabinene hydrate)Sh,HD!or SD!
(carvone, menthone)HD
(linalool, germacrene D, β-caryophyllene, 1,8 cineole)Sh!orL! (menthol, menthone) (carvone, limonene, 1,8-cineole, menthone, linalool, isomenthone)Sh,SD (piperitenone oxide)Sh,SD
(menthol, carvone, D-Limonene)L,HD (piperitenone oxide)Sh,HD
(carvone, cis-carveol, limonene)L (Carvone, Limonene, Cineole, Linalool, Menthol, Dihydrocarvone)SD
(Carvone, Limonene, a-pinene, Cineole, Linalool, Menthol, Dihydrocarvone)SFE
[AB/AF/AM/AO/IS/MP]Sh,HD!orSD!
[IS/LA/MR]L (LA and MR: against Culex quinquefasciatus, Aedes aegypti, Anopheles stephensi)L
(AO: good activity)Sh,HD!orSD! (AO: good activity)L,HD
(strong AB: Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pasturella multocida)Sh,HD!orSD! (strong AF: Aspergillus niger, Mucor mucedo, Fusarium solani, Botryodiplodia theobromae, Rhizopus solani)Sh,HD!orSD!
(AM: Enterococcus faecium, Salmonella cholerasuis, B. subtilis)Sh,SD
[199]
3Ocimum forsskaolii Benth. L/Fl/Sh.(0.45 to 0.47)L,SD (0.6 to 0.96)Fl,SDHD/SD/H(estragole, linalool)L/Fl/Sh,SD
(linalool, methyl chavicol, (E)-methyl cinnamate, myrcene, eugenol)
((R)-(-)-linalool, (S)-(+)-1-octen-3-ol, trans-caryophyllene, naphthalene,
methyl salicylate, (R)-(-)-a-copaene, methyl cinnamate, (E)-ocimene)
(benzene, methyl-)Sh,SD
(Bicyclo hept-2-ene, 2, naphthalene, phytol)Sh,SD
[AB/AF/AM]L,SD [AO]Sh,SD (MR: against female Anopheles gambiae)Sh,HD
(MR: Aedes aegypti)H
(weak AF: against Dermatophytes)L,SD
(AM: Candida albicans)Sh,SD
[69,131]
4Salvia aegyptiaca L. W(Yellow color/same plant odor)W,SD(0.033!)W, SDSD(Terpenoidal constituents, fat derivatives)W,SD
(Aristolene, diphenyl amine, methyl palmitate)W,SD
.[2]
5Salvia macilenta Boiss. Sh/W..HD(Rich in monoterpene hydrocarbons)Sh,HD
(γ-elemene, thymol, elemol, β-caryophyllene)Sh,HD
.[3]
6Salvia macrosiphon Boiss. Sh(Yellow color)Sh,HD(0.14)Sh, HD (0.14 to 0.23)Sh, HD (0.5)Sh,HDHD/SD(Sesquiterpenes, α-Gurjunene, β-Cubebene, Germacrene-B)SD
(linalool, hexyl hexanoate, hexyl isovalerate, hexyl-2-methyl-butanoate, sclareol, hexyl octanoate)Sh,HD
(δ–Cadinen and Sclareol, Franesol, δ-Amorphene Caryophyllene oxide, Hexyl octanoate, Beta Eudesmol, α-Bisabolol, α-Muurolol, Decanoic acid, Manoyl oxide, Manool)Sh,HD
(Sclareol, (+) Spathulenol, (-)-Aristolenel, β-Elemene, Hexyl n-valerate, Germacrene D, β-Eudesmol)Sh,HD (linalool, hexil isovalrate, hexil 2-methyl buterat, δ-cadinen) (piperitone)
[AM] (AM: Streptococcus pneumoniae, Klebsiella pneumoniae, Staphylococcus aureus, Escherichia coli, Staphylococcus epidermidis)[140,141]
7Salvia mirzayanii Rech.f. and EsfandiariSh(Yellow color)Sh,HD (2.2)Sh,HD (11.2)MW (0.50 to 9.67)SFE HD/MW/SFE (linalyl acetate, 1,8-cineole, linalool, 8-acetoxy linalool)HD/SFE
(linalyl acetate, linalool, 1,8-cineol, 8-acetoxy, linalool, a-terpineole, E-anethole, d-cadinene)HD
(linalyl acetate)SFE
(spathulenol, γ-cadinene, linalool, α-terpinyl acetate, α-cadinol, β-eudesmol, cubenol, linalyl acetate)Sh,HD
(α-terpinenyl acetate, 1,8-cineol, linalool)Sh
(linalyl acetate, linalool, α-terpinyl acetate, 1,8–cineol, α-terpineol, δ-cadinene)HD
[AM]Sh [AB] (AM: good activity)Sh (AB: against E.coli, S.aureus, K.pneumonia, B.subtilis, P.aeroginosa)[200]
8Salvia spinosa L. Sh(Yellow color)Sh,HD(0.2)Sh,HD (0.02)Sh, HDHD/SD(High amounts of monoterpene derivatives, low amounts of sesquiterpenes, phenylpropanoids, aliphatic esters)Sh,HD (thymol)Sh,HD
(1,8-cineol, (z)-β-ocimene, germacrene d, 2-Butyl thiophene, trans caryophyllene, 3-Butyl thiophene)Sh,HD
((E)-β-ocimene, β-caryophyllene, isopentyl isovalerate)Sh,SD
[AB/AM]Sh,HD
(AB: Staphylococcus aureus, Basillus subtilis, Psedomonas aeruginosa)Sh,HD
[136]
9Teucrium polium L. L/St/Sh(Yellow color)Sh,SD(0.8 ± 0.04)Sh, HD (0.8) (1.7) (0.2)Sh,HD (0.75)L/St,HD (1.2)Sh,HD (0.21)Sh, SD SFE HD/SD/SFE(Sesquiterpenes, Germacrene D, β-caryophyllene)HD/SFE (terpenoidal compounds, rich in alcohols, esters) (8-cedren-13-ol, β-caryophllene, germacrene D, sabinene)Sh,HD
(α-pinene, β-pinene, p-cymene) (α-cadinol, 3β-hydroxy-α-muurolene, α-pinene, β-pinene)Sh,HD
(β-pinene, limonene, α-phellandrene and γ- and δ-cadinenes. Alcohols: linalool, terpine-4-ol, cedrol, cedrenol, guaiol) (a-pinene, linalool, caryophyllene oxide, b-pinene, b-caryophyllene)L/St,HD (germacrene D, bicyclogermacrene, ß-pinene, carvacrol)Sh,SD
(β-pinene, β-caryophyllene, α-pinene, caryophyllene oxide, myrcene, germacrene-D)Sh
[GP]Sh,HD [ASP] [ASP]Sh,HD [AB]HD [moderate AM]Sh,SD
(AB: against Bacillus cereus)HD (AM: moderate effect against Bacillus cereus, Enterococcus faecalis, Escherichia coli, Staphylococcus aureus)Sh,SD
[137]
10Teucrium stocksianum Boiss. Sh/Fl(Light yellow color)Sh, HD(0.34)Sh, HD (0.4)Sh,HDHD(Sesquiterpenoids rich, cis-sesquisabinene hydrate rich, epi-β-bisabolol, guaiol, β-eudesmol, monoterpenoids rich)Sh,HD
(a-cadinol, 6-cadinene, seychellene, P-caryophyllene, germacrene-D-4-01, germacrene D, γ-cadinene, a-muurolene, valencene)Sh,HD
(camphene, α-cadinol, myrcene, carvacrol)HD
(Monoterpenoids: α-pinene, β-pinene, myrcene, sabinene)Sh,HD
[AN]Sh,HD[6]
11Zataria multiflora Boiss. L/Sh.(3)SD (2.8)HD (1.59 ± 0.86 to 0.99 ± 0.29)Sh,
HD
(1.66, 1.71, 2.8) (0.82 to 0.97)Sh,HD (3.66, 3.44)MW
HD/SD/MW/SFE(Rich oxygenated monoterpens)Sh,HD (phenolic monoterpenes, glycosides of monoterpenes, polyhydroxy monoterpenes, benzoic acid derivatives, alkanes, β-sitosterol, betulin, fatty acids, oleanolic acid)
(thymol, λ-terpinene, ρ-cymene)SD/SFE (carvacrol, thymol, p-cymene, linalool, α-terpineol)
(thymol, carvacrol, para-cymene, c-terpinene, b-caryophyllene)HD
(Thymol, carvacrol, ρ-cymene)Sh,HD (thymol, carvacrol, p-cymene, linalool, γ-terpinene) (γ-terpinene, α-pinene, eucaliptol, globulol)SD
(oxygen-containing monoterpenes, sesquiterpene hyrocarbons, monoterpene hydrocarbons)Sh
(linalol, linalyl acetate, β-caryophyllene)Sh (thymol, a phenolic compound of oxygenated monoterpens)Sh,HD
(carvacrol, thymol, linalool, p-cymene)Sh,HD
[IS]Sh [AB/AO]HD [AF]SD [AF]Sh,HD [AM]Sh,SD
[strong AO]Sh,HD [CE]
(AB: strong activity especially against G-bacteria. Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Staphylococcus epidermidis, Enterococcus faecalis, Bacillus subtilis, Salmonella typhi, Seratia marcescens, Shigella flexneri)HD
(AB: Staphylococcus aureus)Sh,HD (IS: against Rhyzopertha dominica, Togoderma granarium)Sh
(AF: against aflatoxin by Aspergillus flavus)SD
(AM: Bacillus cereus, Salmonella Typhimurium, Staphylococcus aureus)Sh,SD
(AB: Staphylococcus aureus, Escherichia coli)L
(G+: Bacillus subtilis, Staphylococcus epidermidis. G-: Pseudomonas aeroginosa, Escherichia coli. Pathogenic yeasts: Candida albicans, Candida tropicalis)Sh,HD
[141]
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Shahin, S.M.; Jaleel, A.; Alyafei, M.A.M. The Essential Oil-Bearing Plants in the United Arab Emirates (UAE): An Overview. Molecules 2021, 26, 6486. https://doi.org/10.3390/molecules26216486

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Shahin SM, Jaleel A, Alyafei MAM. The Essential Oil-Bearing Plants in the United Arab Emirates (UAE): An Overview. Molecules. 2021; 26(21):6486. https://doi.org/10.3390/molecules26216486

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Shahin, Suzan Marwan, Abdul Jaleel, and Mohammed Abdul Muhsen Alyafei. 2021. "The Essential Oil-Bearing Plants in the United Arab Emirates (UAE): An Overview" Molecules 26, no. 21: 6486. https://doi.org/10.3390/molecules26216486

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