Japan Flora: Rhizomes slender, long-creeping, about 1.5 mm. across, densely scaly toward the tip, the scales appressed, deltoid-ovate, 0.5-0.7 mm. long, abruptly acuminate, black­brown; fronds evergreen, remote, 10-20 cm. long, glabrous; stipes 2-5 cm. long; blades thinly coriaceous, linear-lanceolate, 0.5-1.5 cm. wide, acuminate at both ends, entire, the margins sometimes slightly recurved, green, with minute appressed ovate scales along the costa beneath while young; costa raised on both sides, the veins invisible; sori on upper half of the blade, medial.              Mossy rocks and tree-trunks in mountains.

Hokkaido, Honshu, Shikoku, Kyushu. s. Kuriles. The typical variety occurs in e. Siberia, Manchuria, China, and Ko­rea.