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Antrophyum stenophyllum Baker.

Rhizome shortly creeping, apex ascending or erect; scales pale-brown, subulate-lanceolate, 4-5 mm, 0.5-1 mm wide at base, margin dentate, base lacerate, clathrate. Fronds clustered; stipe ca. 1 cm or shorter, appressed and winged, base slightly swollen, covered with scales like those on rhizome, verrucate after loss of scales; lamina leathery, linear, 15-20 × 0.7-1 cm; costa obvious, inframedial visible, evanescent upward; veins reticulate, forming 2 or 3 linear areoles. Soral lines linear, submarginal, one row on each side of costa, parallel to costa, or interrupted, slightly immersed in grooves, middle part fertile; paraphyses filiform, longer than sporangia. Spores trilete, tetrahedral-globose, surface ornamentation obscure.

Epiphytic by streams in dense forests; 300-1000 m. Guizhou, Yunnan [Vietnam].

Antrophyum vittarioides is close to A. brookei Hooker and A. subfalcatum Brackenridge from tropical Asian islands in the soral lines usually in one row near the margin on both sides of fronds. It is superficially like Haplopteris fudzinoi (Makino) E. H. Crane.