Volume 3 > Part 2 > Year 1989 > Page 215 > Parkeriaceae > Adiantum

9. Adiantum flabellulatum L.wfo-0001107189

Sp. Pl.: 1095. 1753; Bedd., Handb. Ferns Brit. India: 88. 1883; C.Chr., Bot. Tidsskr. 32: 347. 1916; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 186. 1940; Holttum, Rev. Fl. Malaya 2: 603. f. 354. 1955; Ching, Acta Phytotax. Sin. 6: 326. 1957.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Rhizome short, erect or ascending, or rarely creeping, bearing a dense tuft of fronds, covered with scales; scales linear, a little broader at basal portion, entire, 8 mm long, shining brown, concolorous. Stipe distinctly grooved on upper surface, bright blackish-brown to nearly black, scales on basal portion, hairy in grooves and glabrous elsewhere, 10–30 cm long, but sometimes up to 50 cm. Lamina pedate or tripinnate with a few pairs of bipinnate pinnae, up to 20 by 25 cm; upper pinnae and pinnules of the large pinnae similar, pinnate with more than 10 pairs of leaflets, linear, about 10 by 2 cm; rachis (of fronds, of pinnae and of pinnules of larger pinnae) like the upper part of stipe, distinctly grooved on upper surface, grooves decurrent to those of stipe, densely pubescent; leaflets fan-shaped, distinctly stalked with stalks densely hairy on upper surface; two basal edges forming broad cuneate base, up to 1.5 by 1.3 cm; distal margin round, serrate, rarely lobed, thin but firm, surfaces quite glabrous; veins not raised. Sori round to elongate, up to 5 mm long, a few to each leaflet.

Thailand : NORTHERN: Chiang Mai (Mae Rim, Doi Chiang Dao), Phitsanulok (Thung Salaeng Luang, Salaeng Haeng); NORTH-EASTERN: Loei (Phu Kradueng); EASTERN: Chaiyaphum; SOUTH-EASTERN: Trat (Ko Chang); SOUTH-WESTERN: Phetchaburi; PENINSULAR: Chumphon (Tha Ko).

Distribution : India, Burma, SW & S China (type), Tonkin, Taiwan, throughout Malesia, and northwards to southern edge of Japan.

Ecology : On humus-rich ground in rather open forests at medium altitudes.

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