Japan Flora: Rhizomes long-creeping, 3- 4 mm. across, prominently scaly, especially at the base of stipes, the scales linear-lanceolate, 4-5 mm. long, long- acuminate, ciliolate, minutely clathrate; stipes straw-colored to pale green, somewhat lustrous, slender, glabrous on upper portion with a fascicle of scales at base; blades thinly herbaceous, ovate to narrowly so, 12-25 cm. long, 7-12 cm. wide, abruptly contracted above and caudate at the tip, pin­nately parted, nearly glabrous beneath, puberulent on upper side, especially on the rachis and costas; segments 7-15 pairs, spreading, linear-lanceolate, 6-15 mm. wide, obtuse，usually slighdy falcate, crenately toothed, the costa slender, raised on both sides, slightly flexuous, decurrent on the rachis, the veins more or less visible on both sides; sori medial. Mossy rocks in mountains.

Honshu (Musashi and Kotsuke Prov.), Shikoku; very rare.