生活型

herb

形態特徵

• Annual herbs; stems 20–70 cm tall, erect, branches spreading, more or less ashy puberulent.
• Middle cauline leaves many, alternate, membranaceous, sessile or petiolate, ovate to elliptic-lanceolate, 3.5–6×2–3.5 cm, apex obtuse, base rounded-cuneate, attenuate into petiole 1–2 cm long; upper leaves gradually smaller.
• Heads 20–30-flowered, ovoid, peduncled, in leafy panicles; involucre depressed-globose, 6–7×8–10 mm, bracts 4-seriate, green, outer ones gradually shorter, lanceolate, acuminate, 3–4 mm long, middle and inner bracts narrowly oblong, subtruncate; corolla glabrous, 4.5 mm long, lobes 2 mm long; anthers short bifid at base.
• Achenes 1–1.8×0.8 mm, 5-ribbed, glabrous. Pappus bristles ca. 3.2 mm long, white.

分布

• 台灣 : an uncommon weed in the south.
• 世界 : Widely distributed in tropical Asia.

引證標本

YUNLIN: Kukeng, Yen 9575. TAINAN: Tungshan, Peng 7091. PINGTUNG: Chiupeng, Peng 7831.

引用文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1091. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)