生活型

herb

形態特徵

• Perennial erect or ascending herbs, to 2 m tall; stems much branched, often reddish, angled, glabrous or pubescent; nodes enlarged.
• Leaves ovate to elliptic, 4–12 cm long, 2–6.5 cm wide, apex acuminate, base truncate or cuneate, upper margins eciliate, both surfaces glabrous, veins papillose or short pilose; petioles 0.5–1.5 cm long, pit-like nectaries present at base; ocreae tubular, 0.3–1 cm long, apex oblique, glabrous, often dropping.
• Inflorescences 3- or 4-flowered fascicles in panicles, axillary, interrupted; peduncles papillose; bracts oblique-funnelform, glabrous to papillose, apex acute, upper margins eciliate. Flowers white, protandrous; pedicels exserted; perianth segments 5, oblong, 2–3 mm long, apex obtuse, outer perianth becoming winged in fruit, 5–6 mm long; stamens 8, base enlarged; styles deeply 3-cleft, included; nectaries absent.
• Achenes brown to dark brown, trigonous, smooth, weakly shining, ca. 2 mm long.

分布

• 台灣 : in central mountain ranges with altitudes of 2,000 to 3,800 m, usually on newly formed gravelly slopes and sunny hillsides.
• 世界 : S, C & E China, Russian Far East, Japan and the Ryukyus. Naturalized in North America and Europe.

引證標本

MIAOLI: Hsiaohsuenshan, Wang et al. 4961. TAICHUNG: Siaoshushan, Liu et al. 294. TAITUNG: Kuanshan, Fukuyama s. n. 1935. HUALIEN: Hohuanshan, Hsu 11098.

引用文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 299. 1996.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)