生活型

herb

形態特徵

• Perennial ascending herbs, to 100 cm tall; stems much branched, pilose; nodes enlarged.
• Leaves lanceolate to narrowly ovate, 6–14 cm long, 2–3.5 cm wide, apex acuminate, base cuneate, both surfaces strigose; petioles 1–4 mm long; ocreae tubular, 1.5–2 cm long, strigose, upper margins ciliate, cilia as long as or longer than ocrea.
• Inflorescences 5- or 6-flowered fascicles in spike-like panicles, terminal or in axils of upper leaves, densely flowered, interrupted below, 4–8 cm long; peduncles strigose, 1–2 cm long; bracts weakly oblique funnelform, glabrous, apex acute. Flowers white to pale green; pedicels included or slightly exserted; perianth segments 5, elliptic, ca. 2 mm long, apex acute; stamens 8; styles 3-cleft to middle, included or exserted; nectaries present.
• Achenes black, trigonous, smooth, shining, ca. 2 mm long.

分布

• 台灣 : very common, usually along ditches and in sunny grassy, wet fields and roadsides throughout the island.
• 世界 : Africa, Afghanistan, India, Himalaya, Malaysia, east to S & SW China, the Ryukyus and the Philippines.

引證標本

ILAN: Suao, Hsu 109. MIAOLI: Tsaochiao, Ou & Kao 8846. NANTOU: Neimoupu, Huang & Kuo 5293. CHIAYI: Wufengmiao, Hsu & Kuo 7490. PINGTUNG: Nanjenshan, Hsu 470; Fungkang, Hsu 4099. TAITUNG: Lanyu, Hsieh 1598.

參考文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 298. 1996.  (Fl. Taiwan 2nd edit.)