Japan Flora: Rhizomes creeping, branched, about 2 mm. across; stipes 15-35 cm. long, slender, the scales on lower half lanceo­late to broadly so, 5-10 mm. long, 1.5-3 mm. wide, brown, entire, those on the upper half linear-lanceolate to linear, 2-3 mm. long, 0.2-1 mm. wide; blades herbaceous, broadly lanceo­late to narrowly oblong-ovate, 25-40 cm. long, 8-15 cm. wide, acuminate, usually scarcely narrowed at base, pinnate, nearly glabrous to thinly pubescent on both sides; pinnae pinnately- cleft to sometimes parted, lanceolate, 1-2 cm. wide, acuminate, spreading, or the lowest pair slightly reflexed, sessile, truncate and nearly equilateral at base, sessile, the upper pinnae small and adnate to rachis at base; pinnules elliptic, 4-7 mm. wide, rounded to obtuse, crenate; sori 6-10 on each pinnule, median; indusia lanceolate to broadly linear, 2-3.5 mm. long, closely parallel, ascending, solitary or sometimes dipkzioid in the lowest acroscopic one, minutely erose to ciliolate.  Shaded places in lowlands and foothills

Honshu, Shikoku, Kyushu; common.  Korea, Ryukyus, Formosa, China, and India.

var. dimorphophyllum (Koidz.) Ohw. Plant stouter; fronds slighdy di­morphic, usually thinly pubescent on both sides at least while young; rhizomes 3-4 mm. across; stipes 20-50 cm. long, sparingly scaly; scales linear-lanceolate to lanceolate, pale brown, 5-12 mm. long; blades ovate-oblong to ovate, 20-50 cm. long, 20-30 cm. wide, not narrowed at base; pinnae 8-10 pairs, broadly lanceolate, 1.5-3 cm. wide, the pinnules nar­rowly ovate-oblong. Shaded places; Honshu, Shikoku, Kyushu.

var. kiusianum (Koidz.) Ohwi. Larger and denser pubescent; scales abundant on stipes and rachis. Kyushu (centr. distr.)