Japan Flora: Evergreen, uniformly clothed with rusty-brown crispate woollike scales while very young; rhizomes stout, erect, densely scaly; stipes 30-50 cm. long inclusive of the lower part of rachis, deeply sulcate on upper side, stout, reddish brown, scaly at base，with several remote pairs of much- reduced pinnae 2-3 mm. long; scales at base of stipes and on rhizomes slightly lustrous, linear, 1-1.5 cm. long, about 1 mm. wide, long-attenuate, minutely toothed at tip; blades monomorphic, chartaceous-coriaceous, linear-lanceolate to lan­ceolate, about 1 m. long, 30-40 cm. wide, simply pinnate, glabrate; pinnules obliquely spreading, linear to broadly so, 15-25 cm. long, 1-1.5 cm. wide, gradually long caudate- acuminate, entire, glabrous, sessile, rounded at base on the anterior side, subcordate to rounded at base and decurrent on the rachis on posterior side, the costa raised beneath, sulcate and raised on upper side; veins simple or once forked near base, parallel; sori in longitudinal rows on the pinnae close to the costas; indusia entire, continuous, about 0.7 mm. wide.   

Kyushu (Yakushima); rare. Ryukyus, Formosa, China, Himalayas, Australia, and Polynesia.