生活型

herb

形態特徵

• Fragile, mostly monoecious, submersed aquatic herbs, in fresh or brackish water.
• Leaves recurved, acute or obtuse, denticulate, ca. 1.5 cm long; auricles spiny, truncate to rounded.
• Staminate flowers solitary, enclosed in a spathe; anthers 1-celled, ellipsoid. Pistillate flowers mostly solitary, without a spathe; stigmas 2.
• Seeds narrowly ellipsoid, slightly curved, areolae transversely elongate.

分布

• 台灣 : in ponds in the north and south.
• 世界 : Java, the Philippines, mainland China, the Ryukyus and Japan.

引證標本

TAIPEI: Neihu, Yang 69b. ILAN: Ilan, Yang 215. TAOTUAN: Tachi, Yang 62b. NANTOU: Sun Moon Lake, Yang 204

參考文獻

• YANG, Yuen-Po. 2000. Flora of Taiwan, second edition 5: 33. (Fl. Taiwan 2nd edit.)