生活型

herb

形態特徵

• Submersed perennial herb; stems slender, branched.
• Leaves green, whorled, 3-4 times forked, segments filiform, minutely serrulate along margins.
• Staminate flowers subsessile; perianth segments many; stamens many.
• Fruit ellipsoid, ca. 4 mm long, with an apical spine, subsessile.

分布

• 台灣 : in ponds and shallow lakes.
• 世界 : USSR, mainland China(Fukien, Yunan).

引證標本

TAINAN: Mahtou, Shimada s. n. 1915.

參考文獻

• YANG, YUEN-PO and LU, SHENG-YOU. 1996. Flora of Taiwan, second edition 2: 617. (Fl. Taiwan 2nd edit.)