Japan Flora: Rhizomes short-creeping, 4-6 mm. across; fronds dimorphic; stipes 30-50 cm. long in the sterile, slighdy longer and more slender in the fertile, pale straw-colored; scales appressed, purple-brown, ovate to broadly lanceolate, 2-3 mm. long, most abundant toward base of stipe; sterile blades lanceolate, 40-80 cm. long, 15-30 cm. wide, pin­nate, the terminal pinna abruptly narrowed, lanceolate, pin- naticleft, caudately long-acuminate, sometimes proliferous at tip, the rachis while young with purple-brown dentate scales about 1 mm. long; lateral pinnae 8-12 pairs, thinly chartaceous, linear-oblong, 10-15 cm. long, 1.5-3 cm. wide, caudately long- acuminate, rounded-lobulate to crenate-toothed, the lobules usually with an awnlike mucro at base of the sinus, truncate to cuneate and very short-petiolulate at base; costa slender, often slighdy rubescent; fertile pinnae 5-9 cm. long, 5-10 mm. wide, obtuse, very short-petiolulate, entire to undulate, entirely cov­ered with sporangia. Woods in hilk and low mountains.

Kyushu (s. distr.). Ryukyus, Formosa, s. China to Indo­china.