生活型

herb

形態特徵

• Perennial herbs, 80–150 cm tall, sparsely arachnoid pubescent or glabrescent.
• Upper surface of leaves glandular-punctate and sparsely arachnoid puberulous or glabrescent, lower surface densely gray or yellowish arachnoid pubescent; basal and lowermost leaves short petiolate, blade ovate, 3–5(–6)×2.5–4(–5) cm, 2-pinnatisect, segments 3 or 4 pairs, lobes linear-lanceolate or linear, 3–6×2–3 mm; middle cauline leaves subsessile, ovate-elliptic, ovate-orbiculate or suborbiculate, 1.5–2.5×0.1–0.2 cm, acute, margins revolute; bracts 3–5-lobed or undivided, lobes and undivided bracts lanceolate or linear-lanceolate.
• Inflorescences narrowly to broadly paniculate. Heads numerous, dense, ovoid or ellipsoid-ovoid, 1–1.5 mm in diam., involucral bracts sparsely pubescent or glabrescent. Outer florets 1–3. Central florets 2–5.
• Achenes oblong
• Used as an antifebrile drug.

物候

Fl. and fr. Aug-Oct.

分布

• 台灣 : forest borders, roadsides, grassy slopes, waste areas; low to middle elevations.
• 世界 : India, Korea, Japan, eastern Russia and China.

引證標本

TAIPEI: Hsinchuang, Leu 13; Tanshui, Faurie 835. MIAOLI: Yuanli, Peng 11102; Shihtan, Peng 5428. TAICHUNG: Fengyuan, Leu 1503.

引用文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 842. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)