生活型

herb

形態特徵

• Perennial herbs with slender branched oblique woody stock producing non-flowering rosulate or erect simple or branched flowering stems, to ca. 100 cm tall, sparingly minutely pilose or glabrous.
• Basal and lower cauline leaves orbicular to ovate-spatulate, crenate to dentate, long petiolate; upper cauline leaves oblong, obtuse, crenate to pinnatifid, sessile, semi-amplexicaul, dark green, puberulous.
• Heads 2.5–6 cm across, solitary, terminating branches, long pedunculate; involucre ca. 10×10–20 mm, bracts 3-seriate, oblong to lanceolate, green, margins and apex narrowly dark purplish, scarious. Ray florets white, 15–25 mm long, disc florets yellow.
• Achenes 2×0.5 mm, black, with 10 strong, buff ribs.

分布

• 台灣 : cultivated and naturalized in the mountains from mid to high elevations.
• 世界 : Eurasian, now naturalized throughout most of the temperate northern hemisphere.

引證標本

ILAN: Tatung, Liu 928. NANTOU: Jenai, Chingching Farm, Chen 971; Patungkuan, Chen 952.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1010. 1998.  (Fl. Taiwan 2nd edit.)