形態特徵

• Rhizomes creeping, scaly at apex.
• Stipes approximate, bearing ovate, acuminate, brown, clathrate scales at base; fronds pinnate, dimorphic; sterile fronds with a pinnatifid apex, the stipes stramineous, 20-25 cm long; pinnae 5-6 cm long, 15-mm wide, the margins crenately lobed, cut about 1/4 way to the costa, with a prominent tooth in each sinus; veins mostly free and forking, occassionally the basal pair of veinlets uniting to formj an incomplete row of costal areolae without included veinlets.
• Fertile fronds with a terminal pinna; laminae about 15 cm long; stipes to 35 cm long; lateral pinnae 12-16 mm long, ovate to lanceolate.
• Sori acrostichoid.

分布

• 台灣 : Growing among rocks in mountain streams.
• 世界 : the Ryukyus.

引證標本

NANTOU: Wuchieh, Kuo 922.

參考文獻

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