生活型

herb

形態特徵

• Stems erect, 25–85 cm long, subtetragonous, loosely crisped-pilose in upper part.
• Median leaves opposite, 12–19 cm long inclusive of petiole (1.5–5 cm long, wingless), usually ternate or pinnatisect, sparsely puberulous on both surfaces, lateral segments ovate, acute, base narrowed into a short petiolate portion, margins mucronulate-serrate, terminal segments ovate or ovate-oblong, short-acuminate, base attenuate or linear-lanceolate, small.
• Heads discoid, 8–9 mm across; peduncles to 3–10 cm long. Involucral bracts 7 or 8, spatulate, 3–4 mm long in anthesis, 5 mm long in fruit, outer ones oblong, 5.5 mm long, inner ones to 9 mm long, lanceolate. Disc florets: corolla tubular, 4.5 mm long, 5-dentate.
• Achenes numerous, 50–70, linear, 7–13 mm long, ca. 1 mm wide, 4-angled, short-strigose. Pappus awns 3 or 4, 1.5–2.5 mm long.

分布

• 台灣 : roadsides and cultivated fields from low to middle elevations.
• 世界 : Widely distributed in tropical and subtropical regions.

引證標本

TAIPEI: Chuwei, Peng 7507; Pinglin, Shen 1843. TAICHUNG: Pahsienshan, Liu 867. NANTOU: Lienhua-chih, Lin 234; Fenghuangshan, Chen 252. KAOHSIUNG: Tenchih, Lin 345. TAITUNG: Lanyu Is., Peng 10658.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 869. 1998.  (Fl. Taiwan 2nd edit.)