草茨藻(原变种) cao ci zao (yuan bian zhong)

Caulinia graminea (Delile) Tzvelev.

Leaves ca. 1 mm wide; auricles narrowly triangular. Fruit usually straight. Seeds with hexangular or irregularly polygonal areoles.

Ponds, paddy fields, usually in still or slow-moving water. Anhui, Fujian, Guangdong, Guangxi, Hainan, Hebei, Henan, Hubei, Jiangsu, Liaoning, Taiwan, Yunnan [India, ?Indonesia, Japan (including Ryukyu Islands), Korea, Malaysia, Myanmar, Philippines; Africa, Australia, Europe; introduced in North America].