Japan Flora: Evergreen, glabrous; rhizomes short, densely scaly, the scales membranous, dark brown, linear, 4-5 mm. long, with 4-6 rows of linear cells, sparsely spinulose- toothed; fronds green, smooth except near base of the stipe; stipes more or less tufted, 3-12 cm. long, 2.5-3 mm. wide, flattened, pale green, smooth; blades rhombic-obovate, 5-12 cm. long, 1.5-3 (-6) cm. wide, abruptly acuminate or caudately acuminate, sometimes shallowly 2-or 3-lobed toward the tip or entire, and often slightly recurved on margin, narrowed to the stipe at base; costa absent, the veins immersed, anastomosing, the areolae linear-lanceolate to lanceolate; sori linear, im­pressed, sunken in a groove along the veins, often partially anastomosing; paraphyses simple or rarely branched, capitate. Moist rocks in mountains.

Honshu (Sagami and Echizen Prov. and westw.), Shikoku, Kyushu; rare. Formosa, China, Indochina, and n. India.