Cheilanthes formosana Hayata
Pteridaceae, subfamily Cheilanthoideae
Cheilanthes formosana Hayata, Enum. Pl. Formos. 5: 612. 1906; Boonkerd & Pollawatn, Pterid. Thailand: 120. 2000. – Aleuritopteris formosana (Hayata) Tagawa, Acta Phytotax. Geobot. 14: 191. 1952; S.K.Wu, Mem. Fac. Sci. Kyoto Univ. Biol. 8: 155. 1983.
Cheilanthes farinosa auct. non (Forssk.) Kaulf.: Tagawa & K.Iwats., Fl. Thailand 3: 203. 1985, p.p.
Rhizome short, erect to ascending, scaly; scales black in centre, margins paler, narrowly ovate. Stipes 5–12(–23) cm long, dark purplish to castaneous, polished, scaly at base; scales lanceolate, thin, blackish in centre and brownish at marginal portion. Laminae bipinnate, 5–10(–17) by 2–7 cm, oblong to lanceolate, covered with white or yellow waxy powder on lower surface; pinnae 4–6 pairs. Indusia free, not or slightly lacerate at margin .
Distribution in Thailand
NORTHERN: Chiang Mai, Chiang Rai, Lamphun.
On rocks in light shade in mixed deciduous forests at medium altitude.
Proposed IUCN Conservation Assessment
Cheilanthes is a difficult genus that needs more taxonomic research.
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