Elaphoglossum stelligerum (Wall. ex Baker) T.Moore ex Alston & Bonner

Family

Dryopteridaceae

Nomenclature

Elaphoglossum stelligerum (Wall. ex Baker) T.Moore ex Alston & Bonner, Candollea 15: 216. 1956; Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 4: 92. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 304. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 186. 2000. – Acrostichum stelligerum Wall. ex Baker in Hook. & Baker, Syn. Fil. ed. 2: 521. 1874.

Acrostichum yunnanense Baker, Bull. Misc. Inform. Kew 1898: 233. 1898. – Elaphoglossum yunnanense (Baker) C.Chr., Contr. U.S. Natl. Herb. 26: 327, 335. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 539. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2: 455, f. 264. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 89. 1967.

Elaphoglossum viscosum auct. non J.Sm.: Bedd., Handb. Ferns Brit. India: 420, f. 250. 1883.

Description

Rhizome short creeping, densely scaly throughout; scales light brown, up to 7 by 0.7 mm, persistent, subentire or with irregular teeth at margin. Sterile frond: stipe stramineous, 5–10(–20) cm in length, densely scaly throughout; scales various, like those on rhizome, minute and hair-like, or stellate; lamina linear-lanceolate, more or less falcate, gradually narrowing towards both ends, 20–50 by 1.5–3 cm; midrib raised on both surfaces, densely covered with scales; veins simple or a few times forked, parallel, the apex ending at margin of frond, hardly visible on both surfaces or distinct on lower surface in dried specimens; papyraceous, deep green, densely covered on both surfaces with brown long-armed stellate scales, upper surface of lamina often glabrescent, lower surface occasionally so. Fertile frond lower than the sterile one; stipe like those of the sterile fronds, longer; lamina linear, acute at apex, 20–35 by 1–1.5 cm, densely covered with stellate scales on upper surface.

Distribution in Thailand

NORTHERN: Chiang Mai, Phitsanulok; NORTH-EASTERN: Loei.

Distribution in Laos

Champasak.

Wider Distribution

N India, SW China and C. Vietnam.

Ecology

On mossy rocks, often in stream beds, or on mossy tree trunks in dense evergreen forest at altitudes above 1000 m.

IUCN Conservation Assessment

Least Concern (LC) as listed on the IUCN Red List at http://www.iucnredlist.org/apps/redlist/details/177172/0.

Voucher specimens - Thailand

Middleton et al. 5079, Phitsanulok, Phu Hin Rong Kla National Park (E); Middleton et al. 5144, Loei, Phu Luang Wildlife Sanctuary (E).

Voucher specimens - Laos

Poilane 28568, Champasak, Boloven Plateau (P).

Habit

Habit

Habit

Habit

Habit

Habit

Habit

Habit

Habit

Habit

Rhizome and stipe bases

Rhizome and stipe bases

Scales on rhizome and stipe bases

Scales on rhizome and stipe bases

Sterile and fertile fronds

Sterile and fertile fronds

Upper surface of young frond

Upper surface of young frond

Upper surfaces of sterile and fertile fronds

Upper surfaces of sterile and fertile fronds

Lower surfaces of sterile and fertile fronds

Lower surfaces of sterile and fertile fronds

Lower surface of fertile frond

Lower surface of fertile frond

Sori

Sori

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