形態特徵

• Rhizomes creeping, 5 mm thick, covered with narrow dull brown scales at apex.
• Stipes approximate, slender, 3-10 cm long, bearing throughout scattered spreading scales; stipes and rachises stramineous, with two grooves on upper side; sterile laminae with a pinnatifid apex and 17-25 pairs of closely placed sessile lateral pinnae, usually with a bud some distance below the tip; lowest pinnae not or only a little shortened but often deflexed; pinnae spreading at right angles to the rachis, 2.5-6 cm long, 8-15 mm wide, truncate and auricled on the acroscopic side, bluntly rounded or rarely acute at apex, the margins crenate or shallowly lobed with a sharp tooth in each sinus, or with short teeth at the vein-endings; veins free, forking, the acroscopic branch veins of the basal forking passing to the sinus-tooth, the others ending near the margins of the lobes, the veins raised on both surfaces.
• Fertile fronds with a stipe 15-20 cm long and oval to ovate pinnae; pinnae 3-12 mm long, entire, petiolulate.
• Sori acrostichoid.

分布

• 台灣 : Growing on rocks in mountain streams.
• 世界 : S. China, N. India, Indo-China, Thailand, Malay Peninsula, the Ryukyus, the Philippines, Malaysia and Indonesia.

引證標本

TAIPEI: Tatungshan, Kuo 1424; Chinpingshan, Kuo 2495*. ILAN: Oobisan, Masamune s. n. 1938. TAICHUNG: Tungshih, Simozawa 626. NANTOU: Fenghuangshan, Kuo 6748; Chitou, Kuo 375, Tsai 2177. CHIAYI: Fenchihu, Kuo 1636. KAOHSIUNG: Chishan, Sasaki s. n. 193; Liukuei, Smith 603. PINGTUNG: Nanjenshan, Yang 127, Tsai 1359; Pinlang, Hsu 7981. TAITUNG: Kueihu, Kuo 119; Is. Lanyu, Huang & Kao 6204.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 356. 1994.  (Fl. Taiwan 2nd edit.)