形態特徵

• Rhizomes very slender, rather sparsely covered with brown hairs.
• Stipes 0.5-1.5 cm long, not winged; primary fronds fan-shaped, irregularly dichotomously branched, not dissected to base, usually not over 1 cm long, sometimes wider than long, often but not always proliferous (specimens from Siberia, Japan, mainland China and Taiwan are usually not proliferous), a second frond with stipe arising from a bud at the base of the primary frond; veins dichotomously branching and without false veins.
• Sori sunken in the apices of the ultimate segments, the indusia tubular, rather broadly winged, with conspicuously dilated mouth; receptacles exserted, protruding when old.

分布

• 台灣 : Growing on mossy rocks and tree trunks in the moist places of forests.
• 世界 : China, Vietnam, Cambodia, Siberia, Korea, Japan, the Ryukyus, the Philippines, Malaya, Indonesia, Polynesia and Africa.

引證標本

TAIPEI: Wulai, Chuang 2587; Tatungshan, DeVol 9031. ILAN: Nanao, Kao 3104. TAICHUNG: Hsuehshan, Kuo 3912. NANTOU: Lushan, DeVol 8319; Kuantaochi, Tsai 10210*. KAOHSIUNG: Shanping, Kuo 1912. PINGTUNG: Nanjenshan, Kao 7413. TAITUNG: Tawu, Shieh & Chen 13; Is. Lanyu, Shieh et al. 428. HUALIEN: Lintienshan, Chao 60.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 108. 1994.  (Fl. Taiwan 2nd edit.)