Family

Hymenophyllaceae

Nomenclature

Abrodictyum pluma (Hook.) Ebihara & K.Iwats., Blumea 51(2): 243. 2006. – Trichomanes pluma Hook., Icon. Pl. 6: t. 997. 1854.

Trichomanes meifolium Bory ex Willd., Sp. Pl. 5: 509. 1810; Copel., Philipp. J. Sci. 51: 265. 1933; Holttum, Rev. Fl. Malaya ed. 1, 2: 103. 1955 [‘1954’]. – Macroglena meifolia (Bory ex Willd.) Copel., Philipp. J. Sci. 67: 83. 1938; Tagawa & K.Iwats., Fl. Thailand 3: 98, f. 5.8. 1979. – Cephalomanes meifolium (Bory ex Willd.) K.Iwats., Acta Phytotax. Geobot. 35: 177. 1984; Tagawa & K.Iwats., Fl. Thailand 3: 615. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 67. 2000.

Description

Terrestrial. Rhizome 1.2–1.5 mm diam., rather densely covered with bright brownish setose hairs. Stipes rather close, stiff, very narrowly winged, dark brown, hairy when young, 0.7–1 mm diam., to 8 cm long. Fronds oblong-lanceolate, acute at apex, cuneate at base, 7–17 cm long, 2.5–5 cm wide, finely dissected to quadripinnate, second and third branching not in a plane and fronds more or less cubic in form; rachis very narrowly winged, the wings with a single row of cells; pinnae ascending, oblong in outline, round at apex, cuneate to subtruncate at base, in larger ones more than 2 cm long, 1 cm wide, shortly stalked; ultimate segments very narrow, with less than two rows of cells at each side of veins, setaceous, straight. Sori at apices of short segments usually near pinna-rachis; involucre cup-shaped, less than 1 mm long, 0.7 mm diam., the mouth truncate ; receptacles extruded, slender.

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat, Yala.

Wider Distribution

Widely distributed throughout the tropics of the Old World.

Ecology

Terrestrial on humus-rich floor of dense forest at medium altitudes.

Proposed IUCN Conservation Assessment

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