Japan Flora: Rhizomes creeping; stipes stout, pale brown, 25-40 cm. long, scaly at base; scales membranous, linear-lanceolate, 6-10 mm. long, about 1 mm. wide, spinulose; blades broadly ovate* 40-100 cm. long, 30-70 cm. wide, bipinnate; pinnae 10-15 pairs, chartaceous, spreading, brownish, the larger ones ob­long-lanceolate, 20-40 cm. long, 8-15 cm. wide, not con­tracted at base, the upper pinnae simple, linear-lanceolate, pinnately lobulate, the terminal pinna narrowly deltoid, acuminate, pinnatilobed; pinnules lanceolate, 5-10 cm. long, 1-1.8 mm. wide, acuminate, truncate at base, obsoletely toothed, lobulate, sessile to very short-petiolulate; veins 1 to each lobule, pinnately branched, the lower veinlets fused at apex to those of the adjacent vein; sori linear, on the lower part of the veinlets, ascending, 2-4 mm. long, straight or slightly curved; indusia early withering, very thin, solitary or diplazioid on some of the lowest veinlets.

Kyushu (s. distr.). Ryukyus, Formosa, s. China, Indochina, Polynesia to Malaysia, India and Ceylon