Japan Flora: Rhi­zomes creeping, rather loosely leafy, 2-2.5 mm. across, wiry, nearly naked; fronds glabrous; stipes firm, 10-25 cm. long, pale green to brownish, very sparsely scaly; scales subulate- lanceolate, 4-6 mm. long, 1-1,5 mm. wide, entire, brown; blades broadly lanceolate, 20-35 cm. long, 10-20 cm. wide, short-caudate, not narrowed at base, the rachis not winged; pinnae 10-15 pairs, 6-10 cm. long, 1-2 cm. wide, caudate- acuminate, short-petiolulate or a few of the upper ones sessile and adnate at base, slightly falcate, denticulate, often pinnately lobulate, strongly auriculate and truncate at base on upper side, cuneate on lower side; costa and veins often im­pressed above, distinct but scarcely raised beneath; sori on the lowest veinlets, linear; indusia linear, solitary, very rarely diplazioid, slightly arcuate, obliquely ascending, entire, 5-8 mm. long, about 1 mm. wide. Woods

Honshu (s. Kanto Distr. and westw.), Shikoku, Kyushu; rather rare. Ryuk­yus, Formosa, and China.