Japan Flora: Rhizomes long-creeping, slender, usually less than 1 mm. across, thinly scaly; fronds small, delicate, sparsely short-pilose on upper side of stipe, rachis, and costas of the pinnae; stipes nearly filiform,  2-10 cm. long, pale green, brownish and thinly scaly at base; scales on stipes and rhizomes lanceolate, about 1 mm. long, brown; blades lanceolate to oblong-ovatc, 2-8 cm. long, 12-30 mm. wide, acuminate to acute with an obtuse tip, scarcely narrowed at base; pinnae 4-8 pairs, membranous, alternate, ovate to ovate-deltoid, 5-15 mm. long, 5-10 mm. wide, obtuse to rounded at the tip, sessile, thinly pilose on both sides; pinnules elliptic to rounded; veinlets reaching the margin, simple to once forked; sori 1-5 on each pinnule, nearer the margin than the costule; indusia membranous, orbicular-reni- form, about 0.5 mm. across, sometimes oblique, ciliate, pilose on back. Shaded walls and moist rocks.

Honshu (s. Kinki Distr. and westw.), Shikoku, Kyushu. Ryukyus, Formosa, and Korea.