Japan Flora: Fronds slender, evergreen, gla­brous; rhizomes slender, creeping, 1.5-2 mm. across, with linear-lanceolate, dark brown, lustrous, entire scales about 2 mm. long; stipes 3-15 cm. long, green and sulcate on the up­per portion, reddish brown in lower half, glabrous or with few scales toward the base; blades linear-lanceolate, 7-25 cm. long, 1.5-3.5 cm. wide, gradually acute to subacuminate, pinnate, green; rachis usually pale green; pinnae thinly herbaceous, ovate, 8-18 mm. long, 4-7 mm. wide, subacute to obtuse, nearly truncate on anterior margin at base, minutely im- pressed-punctate beneath, short-petiolulate, the posterior mar­gin nearly straight and only slightly incurved toward the apex, entire, the anterior margin toothed or few-lobulate, gently curved to nearly straight; sori on the anterior margin of the pinnae, interrupted, usually with an obscure mucro on both sides; indusia undulate to erose. Wet shaded rocks along streams in mountains.

Honshu (lzu Isls., Ise and Kii Prov.), Shikoku, Kyushu; rare. Formosa and widespread in tropical Asia.