形態特徵

• Rhizomes long-creeping, 3-5 mm thick; scales dark, lanceolate with denticulate margins.
• Fronds deltoid in outline, terminal portion broadly lanceolate, 25-50 cm long, 3-5 cm wide, with 1-3 pairs of widely spreading lanceolate basal lobes; upper part of stipe with decurrent wing, lower half of stipe not winged.
• Sori linear, continuous between main veins.

分布

• 世界 : Japan, the Ryukyus.

引證標本

ILAN: Is. Kueishan, Masamune & Sasaki s. n. 1932.

引用文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 477. 1994.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)