Japan Flora: Brown-scurfy throughout except for the upper side of frond; rhizomes short, covo*ed with the persistent remains of old stipes; stipes 55-60 cm. long, about 5 mm. across at base，stra­mineous to rusty-brown toward base; blades thinly herbaceous, narrowly triangular-ovate, 50-70 cm. long, 25-40 cm. wide, tripinnate, the rachis grooved on upper side, bulbils present in axils of median and upper pinnae; pinnae broadly lanceolate, to 30 cm. long and 10 cm. wide in the lower ones, long-acumi­nate, spreading, short-petiolate; pinnules lanceolate, to 7 cm. long and 1.5 cm. wide, acute to acuminate, sessile; ultimate pinnules and segments oblong to ovate, to 1 cm. long and 5 mm. wide, obtuse, obliquely cuneate at base, crenate-incised to pinnatifid; sori submarginal, naked.     

Honshu (Tanba, Kii, and Suwd Prov.); very rare.