Japan Flora: Rhizomes short, erect, with a tuft of old stipes, the scales chartaceous, broadly linear, 4-5 mm. long, black-brown, entire; fronds tufted, with minute capitate hair like scales while young; stipes erect, terete, nearly black, lustrous, 3-10 cm. long, 0.2-0.5 mm. across; blades narrowly deltoid, 4-8 cm. long, 1.5-4 cm. wide, long- attenuate, subacute to obtuse at the tip, bipinnate in lower portion, simply pinnate in upper portion, the rachis sulcate on upper side; lower pinnae spreading, firmly herbaceous, narrowly oblong-ovate, 8-20 mm. long, 5-8 mm. wide, obtuse, sessile, the upper pinnae obliquely spreading, the lowest anterior pinnules slightly larger than the others; pinnules obliquely elliptic to oblong, 3-6 mm. long, 2-4 mm. wide, obtuse, often slightly imbricate, obtusely few-toothed, slightly decurrent; veins and costules slender; sori solitary to few on the upper portion of the pinnules, subcostular; indusia 1-2 mm. long. Calcareous rocks;