生活型

herb

形態特徵

• Herb; stem rooting at nodes, green or with several pink stripes, glabrous; stipules white, deltoid, 0.4-0.8 mm long, incised at apex, glabrous.
• Leaves ovate-rounded to rounded-elliptic, 2–5 mm long, 1–3.5 mm wide, retuse to rounded at apex, obliquely rounded to cordate at base, entire at margin, glabrous on both surfaces; petioles pale green, 0.2–1 mm long, glabrous.
• Cyathia solitary at nodes; involucres turbinate-campanulate, 0.5-0.7 mm long, glabrous outside, pilose inside; stalks 0.7–1.7 mm long; glands 4, red, rounded to transversely elliptic or oblong, to 0.2 mm long; appendages white, reniform, entire or subundulate at margin; bracteoles acicular to linear, lacerate to laciniate at margin. Male flowers 3–5, anthers red. Female flower with 1–3 minute triangular perianth segments; ovary glabrous; style and stigma ca. 0.3 mm long.
• Capsules 1.5–1.8 mm long, 1.6–1.9 mm diam., subtended by persistent perianth segments, exserted, nutant, glabrous, the pedicels to 2 mm long; seeds grayish to brownish, tetragonal, oblong-ovoid, 0.9–1.1 mm long, 0.6-0.9 mm diam., smooth to slightly rugulose.

分布

• 台灣 : Locally, the species grows in sandy places along tarred roads and coastal areas.
• 世界 : The species is of American origin, and is recently naturalized in the western part of Taiwan.

引證標本

TAIPEI: Nankang, Academia Sinica, Chaw & Lin. 996. HSINCHU: Hsinchu City, Lin s. n. 1987. CHANGHUA: Shenkang, Changpin 2nd Industrial District, Lin & Wang 856. TAINAN: Hsinta Power Plant, Lin et al. 391. KAOHSIUNG: Linyuan, Hsieh et al. 325.

引用文獻

• HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 445. .  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)