生活型

herb

形態特徵

• Annual monoecious herbs with slender prostrate stems.
• Leaves linear, oblanceolate to obovate, 5–12 mm long, 1–5 mm wide, 1-nerved or triplinerved.
• Flowers with bracteoles; male flowers with stamens more than 2 mm long.
• Fruit oblong, higher than broad, notched, margin winged, wings broadest at apex.

分布

• 台灣 : often found in ponds, ditches and paddy fields in the north and center parts.
• 世界 : Widely distributed in the northern hemisphere.

引證標本

TAIPEI: Nankan, Huang 3526. TAOYUAN: Taoyuan, Tanaka & Shimada s. n. 1933. CHIAYI: Chen 2531.

參考文獻

• YANG, Yuen-Po and HSU, Kuo-Shih, Flora of Taiwan, second edition 4: 430. 1998.  (Fl. Taiwan 2nd edit.)