生活型

herb

形態特徵

• Stems filiform, sometimes branched.
• Leaves dimorphic; floating leaves ovate to ovate-oblong, acute; submersed leaves linear or filiform, acute; stipules membranaceous, margins overlapping.
• Spikes short, densely flowered; peduncle 1.4-2 cm long.
• Fruit crowded, pedicellate, compressed, distinctly cristate abaxially; styles persistent, 1-1.2 mm long.

分布

• 台灣 : in ponds and rice fields in the north.
• 世界 : Mainland China, the Ryukyus, Japan and Ussuri.

引證標本

HSINCHU: Shanchiao, Hsu & Kuoh s. n. 1972.

參考文獻

• YANG, Yuen-Po. 2000. Flora of Taiwan, second edition 5: 21. (Fl. Taiwan 2nd edit.)