生活型

herb

形態特徵

• Perennial herbs, 30–170 cm tall; stems erect or ascending, rather stout, striate.
• Basal leaves lanceolate to oblong-lanceolate, 10–30 cm long, 2–8 cm wide, apex acute to acuminate, base cuneate to rounded, margins undulate; cauline leaves subsessile, lanceolate, smaller upward.
• Inflorescence with verticels of flowers densely arranged in panicles, lower whorls often remote; inner perianth segments green; valves orbicular-cordate, 3–6 mm long and wide, entire to weakly denticulate on lower margins, reticulate; callous tubercles present on all 3 valves, unequal, ovoid, 1–2 mm long.
• achenes ellipsoid , dark brown, shining.

分布

• 台灣 : moist ground and waste places throughout the island.
• 世界 : Eurasia, now widely distributed in temperate and warm regions of the northern hemisphere.

引證標本

TAIPEI: Pali, Lin 554; Taipei, Kuoh 1408. ILAN: Tang 1327. TAOYUAN: Yangmei, Peng 3097. TAITUNG: Lanyu, Hsu 4918.

參考文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 314. 1996.  (Fl. Taiwan 2nd edit.)