Asplenium vittaeforme Cav.

Family

Aspleniaceae

Nomenclature

Asplenium vittaeforme Cav., Descr. Pl.: 255. 1802; Parris & Latiff, Malayan Nat. J. 50: 242. 1997.

Asplenium squamulatum Blume, Enum. Pl. Javae: 174. 1828; Bedd., Suppl. Ferns Brit. Ind.: 27. 1892; Holttum, Rev. Fl. Malaya ed. 1, 2: 426. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 84. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 86. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 271. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 178. 2000.

Description

Lithophytic or epiphytic. Rhizome short, creeping to suberect, scaly; scales up to 1.2 cm long, 1.3 mm broad, dark brown, clathrate, the margin paler, fimbriate, some of the projections purple gland-tipped. Stipes dark green to brownish, up to 5 cm long and merging upwards with the decurrent base of frond, scaly throughout with small, brown, clathrate scales. Laminae simple, narrowly elliptic, long-acuminate at apex, broadest in upper 1/4, then gradually narrowing towards attenuate base, 30–50 cm including stipe, up to 8 cm broad, subentire or slightly crisped at margin; leathery, green to dark green, with small irregularly stellate scales on both surfaces when young; midrib distinctly raised above and below, with a rounded profile below and a square profile above, minutely caducous scaly below, glabrous above; veins forming angles of about 45° or more with midribs, more or less visible on both surfaces, usually forked near midribs and free. Sori along simple or acroscopic branch of veins, from near midrib to about 1 cm from edge, occupying whole of under surface except basal portion; indusia entire, up to 1 mm broad, thin but firm, not enrolling the sori , pale brown.

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat, Phatthalung, Trang.

Wider Distribution

Malesia.

Ecology

On muddy rocks in dense evergreen forests at medium altitudes (about 600 m).

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is fairly widespread and not under any known threats.

Voucher specimens - Thailand

Middleton et al. 5420, Phatthalung, Lan Mom Jui Waterfall (E).
Rhizome

Rhizome

Upper and lower frond surfaces

Upper and lower frond surfaces

Lower surface of frond with sori

Lower surface of frond with sori

Lower surface of frond with sori

Lower surface of frond with sori

Sori

Sori

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