Japan Flora: Rhizomes short; stipes 30-50 cm. long, slender, sparsely scaly, straw- colored, often brownish purple on under side, the scales at base linear, 6-8 mm. long, nearly entire, brown to black-brown, the upper ones very sparse, linear to filiform, 3-4 mm. long, brown; blades narrowly to broadly ovate, sometimes nearly deltoid, 25-45 cm. long, 18-30 cm. wide, somewhat contracted in upper part, acuminate; pinnae lanceolate-deltoid to broadly lanceolate, 3-6 cm. wide, caudate-acuminate, sessile, spreading, the lowest ones with a broader posterior side, the rachis and un­derside of costules with small, brown, globose-saccate scales with or without a filiform tip; pinnules herbaceous, broadly lanceolate to narrowly deltoid-ovate, 1.5-5 cm. long, 5-22 mm. wide, obtuse to subacute, sessile, pinnately lobed to parted, as­cending-toothed ; indusia absent.   

Honshu (Izu Prov. through Tokaido to Kinki Distr.), Shikoku, Kyushu.