形態特徵

• Rhizomes sparsely covered with long, yellowish-brown, multicellular hairs, becoming glabrescent.
• Stipes about 3 cm long, winged towards the rachis, the sdges of wing more or less toothed; fronds ovate to lanceolate, tripinnatifid, 5-10 cm long and 3.5 cm wide; rachis winged throughout; pinnae usually not quite touching each other, lowest largest or sometimes a little smaller than the next above them ; largest pinnae 2 cm long and 12 mm wide, their rachises winged like the main rachis; pinnules several on each side of larger pinnae, the lower ones usually with 3 on more lobes; lobes usually rather more than 1 mm wide, toothed and slightly crisped.
• Sori on the upper part of the lobes, sometimes several on each pinna; indusia elliptical cleft nearly to base, bearing irregular stiff teeth or spines outside, the lips about as long as the basal part, bluntly triangular to semi-elliptic, with strongly toothed edges; receptacles cylindrical, extruded, protruding when old.

分布

• 世界 : China, Hainan, Indo-China, N. India, Ceylon, Burma, Vietnam, the Ryukyus, Malaya, Indonesia and Fiji.

引證標本

TAIPEI: Ruggyahu, Suzuki 21359. PINGTUNG: Mutan, Simozawa s. n. 1938. TAITUNG: Is. Lanyu, Kuo 2187, Shieh & Tsai 6398*.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 116. 1994.  (Fl. Taiwan 2nd edit.)