Japan Flora: Rhi­zomes long-creeping, scaly, 3-4 mm. across, the fronds remote, the scales membranous, clathrate;stipes 5-25 cm. long, straw- colored, sparsely scaly while young, usually winged; blades chartaceous-herbaceous, simple, lanceolate to broadly so, 15-40 cm. long, 牛，6 cm. wide, acuminate, gradually narrowed or cuneate at base, decurrent on the stipe, entire or obsoletcly undulate; costa raised, stouter beneath, the veins numerous, spreading, raised beneath, parallel, slightly flexuous, the vein- lets raised beneath; sori interrupted, in a series between the lateral veins, round, sometimes oblong or elongate by fusion of several sori, about 2 mm. across. Moist places in woods

Kyushu (Yakushima and Tanegashima); rare. Ryukyus, Formosa, China to India, and Philippines.