生活型

herb

形態特徵

• Perennial herbs; stems ascending or erect, internodes slightly puberulous in opposite two lines.
• Leaves chartaceous, oblanceolate to narrowly obovate, puberulous in axils and nodes when young, glabrescent.
• Inflorescences axillary, ovoid; peduncles mostly 1–3 cm long, puberulous in grooves, velutinous on upper part; bracteoles triangular-ovate, ca. 2 mm long; perianth segments 5, white, scarious, glabrous, ovate, equal, 4–6 mm long, 2–3 mm wide, 1-nerved; stamens 5, alternating with pseudo staminodes, linear-oblong.
• Utricle rounded, black.

分布

• 台灣 : beside ponds, ditches and in waste fields.
• 世界 : Native to Central America.

引證標本

TAIPEI: Wukoo, Huang 519; Toutinli, Kao 10010. TAOYUAN: Tayuan, Huang 519. TAICHUNG: Shui-ku-tou, Yang 816.

參考文獻

• LIU, TANG-SHUI and KAO, MUH-TSUEN, Flora of Taiwan, second edition 2: 395. 1996.  (Fl. Taiwan 2nd edit.)