生活型

herb

形態特徵

• Annual decumbent or climbing herbs, to 70 cm tall; stems much branched, angled, armed with recurved prickles.
• Leaves deltoid, 1.5–7 cm long, 2–6.5 cm wide, apex subacute to acuminate, base cordate to sagittate, with two triangular lobes, both surfaces pilose, beneath veins retrorsely prickly; petioles 1.5–6.5 cm long; ocreae tubular, pilose, upper margins expanded and foliaceous, ciliate.
• Inflorescences 2–3-flowered fascicles in head-like racemes, terminal or axillary; peduncles retrorsely prickly, glandular pubescent, 2–5 cm long; bracts lanceolate, apex acuminate, upper margins ciliate. Flowers white to pink; pedicels included; perianth segments 5, elliptic, 3–4 mm long, apex obtuse; stamens 8; styles 3-cleft, included; nectaries present.
• Achenes dark brown to black, trigonous, rugose, not shining, 3–3.5 mm long.

分布

• 台灣 : at low to middle altitudes, in open sunny or partial shady thickets along roadsides.
• 世界 : Russian Far East, China (S, E & NE), Korea, Japan and the Ryukyus.

引證標本

TAIPEI: Kuanyingshan, Chuang 3914. NANTOU: Lushan, Hsu & Kuo 11539. PINGTUNG: Chiuhaocha, Li 273. HUALIEN: Wenshen, Hsieh & Yang 1554.

參考文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 311. 1996.  (Fl. Taiwan 2nd edit.)