形態特徵

• Corms 3-4 lobed.
• Leaves widely spreading, 7 to 24 cm long, in tufts of 15 to 90 or more, flattened on upper side, rounded on lower side, the base expanded with membranaceous margins, with scattered stomata near the tips, peripheral fibers absent; ligule elongate, triangular; velum rudimentary, only covering top of the sporangium.
• Megasporangium oval; megaspores gray when wet, white when dry, rugulate on basal side, other sides of megaspores tuberculate, 280 to 390 μ in diameter; microspores gray, elliptic, with small spines, 25 x 15 μ.

分布

• 台灣 : Only known from Taiwan. Growing in shallow ponds, submersed most of the year.

引證標本

TAIPEI: Chonghu(Chihsingshan), Hsu & Chang 1715, DeVol 8005*, Huang 13558.

參考文獻

• DEVOL, CHARLES E., Flora of Taiwan, second edition 1: 58. 1994.  (Fl. Taiwan 2nd edit.)