Volume 3 > Part 4 > Year 1989 > Page 500 > Polypodiaceae > Pyrrosia

8. Pyrrosia lanceolata (L.) Farw.wfo-0001108667

Amer. Midl. Natur.12: 245. 1930; Ching, Bull. Chin. Bot. Soc. 1: 70. 1935; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 515. 1941; Tagawa, J. Jap. Bot. 38: 326. 1963; Hovenkamp, Leiden. Bot. Ser. 9: 191. f. 25. 1986, p.p.— Acrostichum lanceolatum L., Sp. Pl. 2: 1067. 1753.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Rhizome long-creeping, about 1.5 mm diam., bearing fronds 2–5 cm apart, densely scaly throughout; scales larger, lanceolate, gradually narrowing towards apex, up to 7 by 1.2 mm, brown in central portion, paler towards margin, bearing downy hairs at margin of apical portion. Stipes very short, up to 2 mm long, scaly at base, densely hairy. Laminae linear-lanceolate, gradulaay narrowing towards both apex and base, 5–13 cm long, up to 5–8(–13 ) mm broad; midrib distinct on both surface, not raise, veins invisible, anastomosing; coriaceous, thick, both surfaces densely covered with a tomentum of stellate hairs. Sori round, covering the lower surface of apical part of fronds.

Thailand : NORTHERN: Chiang Rai (Mae Lao), Chiang Mai (Chiang Dao, Mae Klang, Mae Hoi), Mae Hong Son; SOUTH-WESTERN: Chanthaburi (Khao Sabap), Trat (Ko Chang).

Distribution : Himalayas to Burma, SW China (Yunnan) and Indochina, S India and Sri Lanka (type), also reported from Polynesia.

Notes: This species is close to Pyrrosia adnascens in one hand and to P. nuda and P. varia on the other hand, from the latter easily distinguished by not dimorphic fronds and rather densely persistent-hairy under surface of fronds, and also by the large less bi-coloured rhizome-scales.

E-version notes : For more details see Ferns of Thailand, Laos and Cambodia.