生活型

herb

形態特徵

• Annual ascending herbs, 30–80 cm tall; stems much branched, glabrous; nodes enlarged, often with red ring at base.
• Leaves lanceolate, 3.5–7.5 cm long, 0.8–2 cm wide, apex acuminate, base cuneate to narrowly cuneate, both surfaces glandular, veins strigose; petioles 0.2–0.5 cm long; ocreae tubular, 1.4–1.6 cm long, apex truncate, strigose and glandular, upper margins ciliate.
• Inflorescences 4–7-flowered fascicles in spike-like racemes, terminal or axillary, interrupted, to 17 cm long; peduncles glabrous, 1.5–3 cm long; bracts funnelform, glandular, upper margins ciliate. Flowers greenish-white to pink; pedicels exserted; perianth segments 4 or 5, elliptic, ca. 2 mm long, glandular, apex obtuse; stamens 5; styles 2-cleft, included; nectaries present.
• Achenes brown to dark brown, biconvex, punctate, not shining, ca. 2 mm long.

分布

• 台灣 : in open waste places and sunny wet places in lowlands, found mostly along streams and on hills.
• 世界 : Australia, temperate and subtropical regions of the northern hemisphere, including the whole area of China, Korea, Japan, the Ryukyus, Europe and North America.

引證標本

TAIPEI: Yungho, Hsu s. n. 1968. ILAN: Nanaw, Hsu s. n. 1987. NANTOU: Chiti, Hsu s. n. 1969.

參考文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 302. 1996.  (Fl. Taiwan 2nd edit.)