生活型

herb

形態特徵

• Herbs, to 30 cm tall, covered with septate hairs; stems slender, square, branched at base, minutely hairy.
• Leaves petiolate; petioles 5–10 mm long, leaves becoming subsessile on upper stem; blades 5–15 mm long, 5–15 mm wide, very broadly ovate, base obtuse to cordate, apex rounded, margins coarsely dentate or lobed, both surfaces minutely hairy.
• Inflorescences of dense verticillate cymes; foliaceous bracts bracts 2, 1–2 cm long, 1–2 cm wide, enclosing the cymes. Flowers sessile; calyx campanulate, puberulent, 5-toothed, 6 mm long, teeth nearly equal, very narrowly triangular; corolla tubular, bilabiate, upper lip galeate, lower lip 3-lobed, lateral lobes ovate, central lobe deeply divided; stamen 4, exserted, anthers 2-celled, divergent, hairy at ends; style hairy, stigma bifid.
• Nutlets ca. 2 mm long, trigonous, truncate at apex, whitish dotted.

分布

• 台灣 : along the roadsides or grassland.
• 世界 : Europe and Asia.

引證標本

CHINGMEN: Chingmen Is., Huang 4987*, 16961.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 477. 1998.  (Fl. Taiwan 2nd edit.)