生活型

herb

形態特徵

• Perennial herbs, caulescent, decumbent. Stems procumbent, branched at base, branches slender, spreading or ascending, 20–50 cm long, hirsute.
• Leaves short petiolate, ovate to ovate-lanceolate, few, 2.5–5 cm long, apex acute or acuminate, margins deeply irregularly serrate, pinnatisect, segments few, narrow, base cuneate.
• Heads solitary, 1–1.5 cm across, peduncle 10–30 cm long. Involucre subcampanulate, 6–7 mm long. Involucral bracts hispid, in few series; outer bracts densely grayish white, elliptic, ca. 5 mm long, long hirsute; inner bracts tinged purplish, narrower, ca. 6 mm long. Ray florets 4, white, ligulate or 2-lipped. Disc florets yellow, tube 5 mm long, limb 5-lobed, lobes reflexed, hairy.
• Achenes brown, oblong, ca. 2 mm long, densely silky pubescent. Pappus 5–6 mm long, of shiny feathery bristles.

分布

• 台灣 : abundantly naturalized in the lowlands of central and southern Taiwan, along exposed, dry roadsides, on waste grounds and in lawns.
• 世界 : Tropical America.

引證標本

MIAOLI: Tunghsiao, Peng 11572. TAICHUNG: Fengyuan, Peng 12164. NANTOU: Hsinyi, Chunta forest road, Wang 203; Tsaotun, Chen 456. TAINAN: Szukunshen, Wang 877. PENGHU: Shanshui, Chen 701. PINGTUNG: Fangshan, Chen 921; Manchou, Peng 7828. TAITUNG: Lanyu Is., Peng 5177; Hungyeh, Leu 833.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1084. 1998.  (Fl. Taiwan 2nd edit.)