生活型

herb

形態特徵

• Branched annuals 10–60 cm tall; stems nearly glabrous below, pilose red capitate glands near inflorescence.
• Leaves short petiolate, ovate to ovate-lanceolate, to 5×3.5 cm, sparingly serrate, 3-nerved. Involucre semi-globose.
• Ray florets 5, white, without pappus; disc florets with awnless pappus scales about equalling or longer than corolla.
• Achenes strigillose.
• Chromosome number, 2n = 16 (Peng & Hsu, 1978).

分布

• 台灣 : naturalized around farms and villages, 1,500–2,100 m.
• 世界 : Native of tropical America, now a cosmopolitan weed.

引證標本

TAICHUNG: Wuling farm, Peng 11986. NANTOU: Mayfeng farm, Peng 6292. CHIAYI: Chuchi, Lai 33.Similar to G. quadriradiata, differing in being less pilose and in characters shown in the key to species.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 967. 1998.  (Fl. Taiwan 2nd edit.)