Cheilanthes argentea (S.G.Gmel) Kunze

Family

Pteridaceae, subfamily Cheilanthoideae

Nomenclature

Cheilanthes argentea (S.G.Gmel) Kunze, Linnaea 23: 242. 1850; Boonkerd & Pollawatn, Pterid. Thailand: 119. 2000. – Pteris argentea S.G.Gmel., Novi Comment. Acad. Sci. Imp. Petrop. 12: 519. 1768. – Aleuritopteris argentea (S.G.Gmel.) Fée, Mém. Foug., 5. Gen. Filic. 154. 1852.

Description

Rhizome short, ascending, scaly; scales lanceolate, apex acuminate, brown. Stipes dark, polished, 10–25 cm long, scaly at lower portion. Laminae pentagonal, 3–8 by 3–8 cm, apex acuminate, pinnatifid to bipinnatifid; lowest pinnae largest, 1.5–4 cm long, adnate to rachis, ultimate segments oblong to narrowly triangular; coriaceous; lower surface covered with white or yellow waxy substances. Sori at margin of lobes, continuous, protected by reflexed margin of lobes.

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

China, Japan, Korea.

Proposed IUCN Conservation Assessment

Data Deficient (DD). There is considerable taxonomic confusion in the genus Cheilanthes making accurate conservation assessments of many of the species difficult.

Notes

Cheilanthes is a difficult genus that needs more taxonomic research.

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