生活型

herb

形態特徵

• Pubescent biennials; stems erect, often branched at base, 20–100 cm long.
• Radical leaves thin, rosulate, oblanceolate, 8–25×1.7–6 cm, acute, base narrowed to a petiole, lyrate-pinnately parted, loosely mucronulate-dentate, slightly crisp puberulous on both surfaces, terminal segments largest, deltoid-ovate, usually rounded, lateral segments gradually smaller.
• Heads 7–8 mm across, many, in terminal corymbose panicles; peduncle 6–25 mm long, slender. Involucre 4–6×3–4 mm, calyculate, outer bracts few, much smaller than inner, ovate, ca. 0.5 mm long, inner bracts 8, lanceolate, obtuse. Flowers 17–19, yellow, 5–8 mm long.
• Achenes oblong, ca. 1.8 mm long, brown, apex gradually narrowed, with 11–13 scaberulous ribs. Pappus white, ca. 3 mm long, persistent.

分布

• 台灣 : very common in wastelands, cultivated fields and on roadsides.
• 世界 : A variable species widely distributed from southeastern Asia to Australia.

引證標本

TAIPEI: Nanya, Peng 14949. ILAN: Lotung, Yang 4656. TAOYUAN: Lungtan, Peng 13690. HSINCHU: Hengshan, Peng 12150. MIAOLI: Taian, Lin 535. NANTOU: Sun Moon Lake, Peng 10411. CHIAYI: Chiayi, Yen 10566. KAOHSIUNG: Shoushan, Yang 324; Tengchih, Peng 11228. PINGTUNG: Wanluan, Peng 10178. TAITUNG: Lanyu Is., Peng 10659. HUALIEN: Taroko, Peng 15447; Mukuahsi, Peng 15417.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1098. 1998.  (Fl. Taiwan 2nd edit.)