A New Species of Argophyllum (Argophyllaceae) with Notes on the Species from New Caledonia and Nickel Hyperaccumulation
Abstract
:1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Taxonomic Section
- Argophyllum J. R. Forst. and G. Forst. [1] (p. 29). Type:—Argophyllum nitidum J. R. Forst. & G. Forst.
- Sectional names
- Argophyllum brevipetalum Guillaumin [22] (p. 25). Type:—New Caledonia, cours moyen de la Tontouta, le long des rives, ± 50 m, 14 December 1940, Virot 375 (holo-: P00537620!)
- Argophyllum ellipticum Labill. [16] (p. 39). Lectotype (designated here):—New Caledonia, Labillardière s.n. (P00537623!, iso-: P00537624!, P00537625!)
- Argophyllum grunowii Zahlbr. [53] (p. 278). Type:—New Caledonia Thio, auf serpentinbergen, September 1884, Grunow s.n. (holo-: W1887-0007474!, iso-: NSW923234!)
- Argophyllum montanum Schlechter [54] (p. 118). Lectotype (designated here):—New Caledonia, Auf den Bergen bei Yaouhé, 700 m, 15 October 1902, Schlechter 15032 (B100715955!; iso-:P00537639!, K000739388!)
- Argophyllum nitidum J.R.Forst. and G.Forst. [1] (p. 30). Argophyllum nitidum var. nitidum J.R.Forst. & G.Forst. Lectotype (designated here): New Caledonia, Forster s.n. (BM000600294!, iso-: BM000600292!, BM00600293!, K000739389! B100296104!, BW04962010!, W0017375!). See Nicolson and Fosberg [56] for a complete list of putative isolectotypes.
- Argophyllum vernicosum Däniker [33] (p. 165). Type:—New Caledonia, im dichten hohen Gebüsch der Crêten in 600 m Meereshöhe am Mt Koghi, 1 February 1926, Däniker 2725 (holo-: Z000015797!, iso-: Z000015798!, Z000015799!)
- Argophyllum riparium Pillon and Hequet, sp. nov (Figure 1)
6. Identification Key to the Species of Argophyllum in New Caledonia
1. Leaf chartaceous, apex pointed, only primary and secondary veins distinct, leaf and inflorescences silky silvery (rarely tinted in red), petals white, calyx short (<2 mm), non-ultramafic substrates | A. nitidum |
1’. Leaf coriaceous, apex pointed or rounded, venation network distinct, leaves and inflorescences glabrous or covered with silver or red hairs, petals yellow, calyx short or as long as petals, generally on ultramafic substrate (occasionally on non-ultramafic but then on poor substrate for A. ellipticum) | 2 |
2. Inflorescences covered with red hairs, leaf margin generally entire | 3 |
2’. Inflorescences covered with white hairs, leaf margin entire to markedly toothed | 6 |
3. Leaf blade covered with red hairs underneath, occasionally white when mature | 4 |
3’. Leaf blade glabrous, shiny underneath | 5 |
4. Overall plant slender, twig slender (diameter 2.5–4 mm), leaf 4–10 cm long, petiole 1.5 mm in diameter, petals and sepals about the same length, low elevation in Tontouta valley (<300 m) | A. brevipetalum |
4’. Plant robust, twigs thicker (diameter 4–6 mm), leaf 5–15 cm long, petiole 2 mm in diameter, sepals much shorter or as long as petals, widespread, mid- to high elevation (400–) 800–1600 m | A. ellipticum |
5. Leaves small (mostly < 10 cm long), twig thin (c. 2 mm in diameter), sepals shortly acute, never more than half the size of petals, well-ramified shrub | A. vernicosum |
5’. Leaves large (mostly > 10 cm long), twig thicker (3–4 mm in diameter), sepals narrowly attenuate, nearly as long as petals, sparsely branched shrub | A. riparium |
6. Leaf glabrous, leaf margin entire, mostly south of Dzumacs-Yaté | A. montanum |
6’. Leaf blade covered with pale to red hairs, leaf margin entire to toothed, widespread and variable | A. grunowii |
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A
References
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Species | Number of Specimens | Min (Ni) | Max (Ni) | Mean (Ni) | Median (Ni) |
---|---|---|---|---|---|
A. brevipetalum | 4 | <LOD | 1675 | 483 | 129 |
A. ellipticum | 12 | <LOD | 6670 | 1215 | 371 |
A. grunowii | 40 | <LOD | 5694 | 1027 | 538 |
A. montanum | 10 | <LOD | 1110 | 316 | 89 |
A. nitidum | 9 | <LOD | <LOD | <LOD | <LOD |
A. riparium | 4 | 173 | 1667 | 708 | 497 |
A. vernicosum | 10 | 116 | 1872 | 608 | 387 |
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Pillon, Y.; Hequet, V. A New Species of Argophyllum (Argophyllaceae) with Notes on the Species from New Caledonia and Nickel Hyperaccumulation. Plants 2021, 10, 701. https://doi.org/10.3390/plants10040701
Pillon Y, Hequet V. A New Species of Argophyllum (Argophyllaceae) with Notes on the Species from New Caledonia and Nickel Hyperaccumulation. Plants. 2021; 10(4):701. https://doi.org/10.3390/plants10040701
Chicago/Turabian StylePillon, Yohan, and Vanessa Hequet. 2021. "A New Species of Argophyllum (Argophyllaceae) with Notes on the Species from New Caledonia and Nickel Hyperaccumulation" Plants 10, no. 4: 701. https://doi.org/10.3390/plants10040701
APA StylePillon, Y., & Hequet, V. (2021). A New Species of Argophyllum (Argophyllaceae) with Notes on the Species from New Caledonia and Nickel Hyperaccumulation. Plants, 10(4), 701. https://doi.org/10.3390/plants10040701