Japan Flora: Frequently sparsely grandular on the stipes and blades, especially so on the nodes of the rachis; blades chartaceous-membranous, firmer, deltoid-ovate, 18-20 cm. long, 14-18 cm. wide; lateral pinnae narrowly ovate-deltoid, 9-10 cm. long, 6-8 cm. wide, the petioles 15-20 mm. long, the lowest pinnae distinctly smaller than the remainder of the blade, the terminal pinna 13-15 cm. long, 10-11 cm. wide; pinnules linear-oblong, rounded to obtuse, pinnately cleft to toothed. Coniferous woods.

Hokkaido, Honshu (Kanto and centr. distr.), Shikoku (high mts.). Korea, n. China, and e. Siberia.