Korea Flora: Habit: Evergreen perennial herb; similar to Dryopteris chinensis but distinguished by readily deciduous scales; leaves fasciculate at apex of creeping rhizome.
Stipe: 15-30 cm long, scaly at base.
Scales: Brown, lanceolate, 5-10 mm long, caducous.
Blade: Pentagonal-ovate, 20-40 cm × 15-30 cm; apex abruptly narrowed and long-acuminate; tripinnate, deeply or completely divided.
Pinnae: Oblong-lanceolate to triangular-broadly-lanceolate; long-stalked; basal pinnae asymmetrically triangular or triangular-broadly-ovate due to enlarged basal posterior pinnule.
Pinnules: Oblong-lanceolate to oblong-ovate; very shortly stalked. Ultimate Segments: Oblong to oblong-lanceolate; margins with undulate, obtuse teeth.
Sori: Located beneath sinus of teeth; indusium round-reniform, translucent membranous.
Note: Distinguished from Dryopteris chinensis by its caducous scales and pentagonal leaf shape.
Habitat: Growing in central and northern regions.

[Translated from Flora of Korea by T.B. Lee]