Korea Flora: Habit: Perennial herb; leaves densely arranged at apex of short rhizome.
Stipe: 20-40 cm long, sparsely scaly with blackish-brown scales along with rachis and pinnae axes.
Blade: Pentagonal-ovate, broadly ovate; apex abruptly narrowed and acute; 15-20 cm × 15-22 cm; tripinnate, completely or deeply divided.
Pinnae: Basal pair largest, broader on posterior side; size abruptly decreasing upwards.
Pinnules: Oblong to ovate-oblong; apex acute or obtuse; very shortly stalked; deeply to completely pinnatifid; abaxial surface with bullate scales. Ultimate Segments: Margins with aristate teeth.
Sori: Arranged on upper portion of basal veinlets; indusium subreniform with entire margins.
Note: Characterized by pentagonal leaf shape, bullate scales on abaxial surface, and aristate teeth on segments.
Habitat: Growing in Baekdu Mountain region.

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