Hymenophyllum blandum Racib.
Hymenophyllum blandum Racib., Pterid. Buit.: 20. 1898; Copel., Philipp. J. Sci. 64: 50, pl. 18. 1937; Tagawa & K.Iwats., Fl. Thailand 3: 612. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 73. 2000. – Meringium blandum (Racib.) Copel., Philipp. J. Sci. 67: 43. 1938; Tagawa & K.Iwats., Fl. Thailand 3: 78. 1979.
Rhizome long creeping, wiry, very slender, about 0.1 mm diam., naked. Stipes terete, usually about 2 mm long, hairy at base. Laminae pinnate-bipinnatifid in plan but digitate in appearance, with about 10 segments, suborbicular to oblong-ovate in outline, typically about 1 cm in both length and width; ultimate segments round at apex, about 0.8 mm broad, the margin denticulate, flat; pale green in colour, axis dark. Sori not known in Thai material; solitary on segments; involucre with tuberous base and bivalvate lips, cleft to half-way, about 1.6 mm long, less than 1 mm broad; lips subdeltoid, moderately acute at apex .
Distribution in Thailand
Evergreen mountain forest.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is fairly widespread and not under any immediate known threat.
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