革舌蕨 ge she jue

Vittaria sulcata Kuhn, Linnaea 36: 68. 1869; Taeniopsis sulcata (Kuhn) Beddome.

Stipe glabrous or nearly so. Lamina linear to linear-oblanceolate, 1.5-5.5 × 0.3-0.4 cm, long attenuate to form a wing at base, apex acute to obtuse; midrib distinctly prominent abaxially, grooved adaxially; lateral veins invisible even with transmitted light, ascending, mostly forked or irregularly branched, extending beyond sorus; hairs absent to sparse, usually visible abaxially on midrib and margin (but lost when old), inconspicuous on both surfaces, if present then simple and forked, pale to medium reddish brown, 0.1-0.3 mm. Sori ± medial between midrib and margin; grooves 0.3-0.6 mm from margin, 0.8-1.2 mm apart, inner edge of groove usually acute and somewhat produced over sori, outer edge attenuate toward margin, mouth of groove obliquely opening toward margin.

On moss-covered tree trunks in dense mountain forests; 800-1500 m. Hainan, N Taiwan [Borneo, Indonesia, Malaysia, New Guinea, Philippines, Sri Lanka. Thailand, Vietnam; Pacific islands].

Material of this species has been misidentified as Scleroglossum pusillum (Blume) Alderwerelt (Vittaria pusilla Blume; Taenitis pusilla (Blume) Mettenius ex Miquel) (e.g., FRPS 6(2): 321. 2000).