Volume 3 > Part 2 > Year 1989 > Page 172 > Oleandraceae > Nephrolepis

2. Nephrolepis davallioides (Sw.) Kunzewfo-0000147518

Bot. Zeitung 1846: 460; Bedd., Handb. Ferns Brit. India Suppl.: 81. 1892; Holttum, Rev. Fl. Malaya ed. 2. 634. 1968.— Aspidium davallioides Sw., Schrad. J. Bot. 1800(2): 33. 1801.

Accepted Name : This is currently accepted.

Description : Rhizome short-creeping, about 1 cm diam., bearing close fronds, densely scaly; scales gradually narrowing from round base to tailed apex, up to 2.5 by 1 mm, dark with brown ferrugineous margin. Stipe stramineous, up to 30 cm long, minutely appressed-scaly, grooved on upper surface. Lamina narrowly lanceolate, up to 1 m or more long, 30 cm wide, pinnate; lateral pinnae up to 50 pairs, basal ones shortened, lower ones sterile, up to 15 by 2 cm, entire, falcate at tip, upper ones fertile, up to 13 by 1.2 cm, lobed at margin, papyraceous; veins forked near costa, visible, all free. Sori one to each lobe at margin of fertile pinnae, terminal on anterior branch of veins, round; indusia usually round, about 1.5 mm broad.

Thailand : PENINSULAR: Surat Thani (Khao Nong), Nakhon Si Thammarat (Khao Luang), Yala (Khao Kalakhiri).

Distribution : Sumatra, Malaya to Celebes (type from Java).

Ecology : On rather dry rocks or on fallen tree-trunks in dense tropical rain forests or in clearings at medium altitudes (1,000–1,500 m).

Notes: This is another species distinguished by having a single sorus on each marginal lobe of the fertile pinnae. The intermediate condition between this and the dorsal position of sori common in the other members of this genus is found in Nephrolepis dicksonioides of Malesia.

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