生活型

herb

形態特徵

• Acaulescent, somewhat stoloniferous. Stems much branched.
• Leaves alternate, in basal rosettes, spatulate, 5–15×1–3 cm, both surfaces pilose, with long, soft, white hairs, irregularly 1- or 2-pinnately parted; segments acute at apex, truncate at base, irregularly dentate, petiole 2–3 cm long, broadened toward base.
• Heads 5–8 mm long, 6–10 mm across, sessile, solitary or clustered at basal nodes, axillary. Involucre hemispheric, bracts in 2 or 3 series, imbricate, oblong, acuminate, margins membranaceous; outer bracts 3–3.5×1–1.2 mm, inner bracts 3–4×0.3–0.6 mm. Outer florets very numerous in several rows, style persistent. Central florets ca. 8–12, corolla tubular, 1.5–2 mm long, 3-lobed, style capitate at tip, stamens 3.
• Achenes wedge-shaped, brownish yellow, villous at tip, 2–2.5×0.1–1 mm, margins thick, corky, rugulose; style persistent.

分布

• 台灣 : long naturalized in waste ground and cultivated fields in Taiwan.
• 世界 : Native of South America.

引證標本

TAIPEI: Nankang, Peng 11372; Tanshui, Pan 4371. ILAN: Wuchieh, Peng 15274. TAOYUAN: Puhsin, Chuang & Kao 3122; Tahsi, Peng 13694. HSINCHU: Chutung, Peng 13698. MIAOLI: Shihtan, Peng 13943. NANTOU: Sun Moon Lake, Peng 10418.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1068. 1998.  (Fl. Taiwan 2nd edit.)