Hymenasplenium obscurum (Blume) Tagawa

Family

Aspleniaceae

Nomenclature

Hymenasplenium obscurum (Blume) Tagawa, Acta Phytotax. Geobot. 7: 83. 1938. – Asplenium obscurum Blume, Enum. Pl. Javae.: 181. 1828; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 225. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 84. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 85. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 279, f. 22.1. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 143. 2000.

Description

Similar to Hymenasplenium excisum (C.Presl) S.Linds. but differing in: rhizome not so long, often green and fleshy; stipe and rachis green or brownish, never polished; lateral pinnae patent, little falcate, less widely spaced; sori short, usually up to 3 mm long, allantodioid or in more or less sausage-form .

Distribution in Thailand

NORTHERN: Chiang Mai, Chiang Rai, Lamphun.

Wider Distribution

Madagascar, Sri Lanka, S India and E Himalaya, Burma, Indochina, S China, Taiwan, and throughout Malesia.

Ecology

On wet sandy ground or on moist muddy rocks in evergreen forests at 900–1600 m alt.

Proposed IUCN Conservation Assessment

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

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