柯氏假脉蕨 ke shi jia mai jue

Trichomanes kurzii Beddome, Ferns Brit. India, t. 286. 1868; Crepidomanes nanophyllum Tagawa.

Rhizome long creeping, irregularly branching, filiform, ca. 0.1 mm in diam., with dense blackish hairs. Stipe greenish, dark at base, up to 3 mm, winged nearly to base. Rachis winged throughout, wings of lower portion up to 0.2 mm wide, entire, flat, broader in upper portion. Fronds pinnate-bipinnatifid, oblong to oblong-lanceolate, up to 1.5 cm × 6 mm, base cuneate, apex rounded; lateral pinnae simple or 2-forked, or extremely large ones with 3 or 4 lobes; simple pinnae or ultimate segments elongate, sometimes up to 5 × ca. 0.7 mm, margin entire and flat, apex acute; surface clathrate, pale bluish green, thin in texture; submarginal false veinlets continuous, with a single row of normal cells outside these. Sori at apex of ultimate segments, often gathered at apical portion of frond; involucres tuberous with dilated mouth, ca. 1.2 mm, up to 1 mm wide in pressed specimens; mouth dilated and with very narrow lips; receptacles projecting.

Epilithic on wet rocks often along streams in dense dark forests; 100-500 m. Hong Kong, Taiwan [India (including Andaman Islands), Japan (Ryukyu Islands), Malaysia, Myanmar, Papua New Guinea, Philippines, Sri Lanka, Thailand; Australia (NE Queensland), Pacific islands (Fiji, New Caledonia)].