Japan Flora: Rhizomes slender, long-creeping, about 2 mm. across, remotely leafy, while young with black-brown linear entire spreading scales 2-3 mm. long; stipes slender, pale green, sparingly scaly, 3-25 cm. long; blades coriaceous- herbaceous, lanceolate to linear-lanceolate, 7-20 (-30) cm. long, 1-2.5 (-3) cm. wide, acuminate, obtuse to acute at base, entire to obsoletely undulate, margin slighdy recurved, gla­brous, dark green above, paler beneath, flat except for the raised midrib beneath; veins once to thrice forked near base, the veinlets parallel, nearly at right angles to the costa; sori linear, parallel; indusia linear, asplenioid, sometimes also diplazioid, 5-12 mm. long, entire. Shaded places.

Honshu, Shikoku, Kyushu; common. Ryukyus, Formosa, China, India to Ceylon.

var. crenatum (Makino) Ohwi.  Blade pinnately lobed to parted, the lobes rounded at apex, entire; sori fw pairs on the lobes, short-linear.   Honshu, Shikoku, Kyushu; common. Ryukyus, Formosa, China, India to Ceylon.