Japan Flora: Stipes 5-30 cm. long, ratlier stout, straw-colored, brown at base, densely scaly, the scales spreading, membranous, brown, lustrous, ciliate, the larger ones broadly ovate, 1-2.2 cm. long, 3-10 mm. wide, abruptly acuminate, the smaller ones lanceolate to linear-lanceolate, 3-10 mm. long, 0.5-2 mm. wide; blades broadly lanceolate, 20-80 cm. long, gradually acuminate, slightly narrowed at base, bi­pinnate or the smaller ones bipinnatiparted, the scales on rachis dense, linear-filiform, 2.5-4 mm. long, contorted, mixed with broader scales in lower portion; pinnae 15-40 pairs, firmly coriaceous, spreading, lanceolate to ovate3 acuminate, subsessile, sparsely scaly on upper side, more densely so beneath, the scales pale brown, hair like, 1-2 mm. long; pinnules obliquely ovate, 7-15 mm. long, 3-7 mm. wide, acute with a pungent spine at the tip, with few spine-tipped teeth on margin, lustrous on both sides; veinlets slender, slightly impressed beneath; sori in 2 series on the pinnules of upper portion of blade; indusia flat, brownish, entire, about 1.2 mm. across.     

Honshu (s. Shinano and Sagami Prov.); very rare. China, Formosa, and India.