形態特徵

• Rhizome 5 mm wide; scales ovate-lanceolate, almost black, iridescent, clathrate, concolorous, lumina all clear, margins with protruding teeth.
• Fronds elliptical or lanceolate, 10-18 mm wide, 10-15 cm long, apex acute or obtuse; veins visible on both surfaces, but not prominent; margin entire, plane. Sori round, large, medial, borne at end of a rather distinct lateral vein.

分布

• 世界 : Afghanistan, northern India, Nepal, China to Siberia, Japan, the Ryukyus.

引證標本

ILAN: Nanhutashan, Fukuyama 3993. HSINCHU: Tapachienshan, Kuoh 3923, Kuo 1787*. CHIAYI: Tatachia, Kuoh 1308. HUALIEN: Chatienshan, Suzuki 15065.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 489. 1994.  (Fl. Taiwan 2nd edit.)