Japan Flora: Rhizomes long-creeping, scaly, L5-2 mm. across when dried, the scales rather firmly membranous, appressed to a«:ending, dark brown, oblong-ovate to ovate-lanceolate, about 2 mm. long, acuminate, entire, obsoletely clathrate, slightly longer and more distinctly clathrate at base of stipe; fronds 15-40 cm. long; blades coriaceous, rather fleshy, narrowly oblanceolate, broad­est above the middle, acuminate or shortly caudate-acuminate, entire, gradually narrowed to the short and slightly flattened purple-brown to dark-purple stipe; costa prominent on upper side, the veins hidden; sori on upper half of blade, usually close together and overlapping, oblique, 1-3 cm. long, nearer the costa than the margin.  Tree trunks in mountains.

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu. China and Indochina.