e-Flora of Thailand

Volume 3 > Part 2 > Year 1989 > Page 273 > Aspleniaceae > Asplenium

13. Asplenium tenerum G.Forst.wfo-0001116683

Fl. Ins. Austr.: 80. 1786; Bedd., Handb. Ferns Brit. India: 147. f. 74. 183; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 226. 1940; Holttum, Rev. Fl. Malaya 2: 432. 1955; Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 3: 253. 1965; Tagawa & K.Iwats., S.E. Asian Stud. 5: 86. 1967; Acta Phytotax. Geobot. 23: 55. 1968.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Asplenium tenerum var. retusum C.Chr.: Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 50. 1968.


Description : Rhizome short, ascending, up to 5 mm diam.; scales narrowing from base towards long-acuminate apex, about 5 by 1.2 mm, dark brown, clathrate, the edges bearing long projections. Stipe up to 15 cm long, dark green to dark brown, scaly throughout with smaller scales or glabrescent. Frond pinnate, usually widest at base, acuminate at apex, up to 27 by 8.5 cm; rachis winged throughout, minutely scaly when young, proliferous; lateral pinnae about 20 pairs, patent to slightly ascending, falcate, acuminate at apex, auricled and subtruncate at acroscopic base and subdimidiate to narrowly cuneate at basiscopic base, regularly serrate with a single veinlet in each tooth, up to 5 by 1.5 cm, the upper ones smaller; chartaceous, green, glabrescent; costa raised above, veins visible on both surfaces, simple or basal acroscopic ones forked; crenae at margin oblique, rounded at apex, one-nerved, about 2 by 1.3 mm. Sori elongate along veins, up to 4 mm long, from near costa to below sinus; indusia thin but persistent, up to 0.8 mm broad.


Thailand : NORTHERN: Phitsanulok (Salaeng Haeng); SOUTH-EASTERN: Chanthaburi (Pong Nam Ron); PENINSULAR: Surat Thani (Pang Wan), Nakhon Si Thammarat (Khao Luang), Narathiwat (Su-ngai Padi), Trang (Khao Chong), Yala (Khao Kalakhiri, Khao Korewang).


Distribution : Ceylon and S India to Polynesia (type), north to Tonkin and Taiwan.


Ecology : On mossy tree-trunks or on rocks in dense evergreen forests at medium altitudes (500–1,100 m).


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


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