生活型

herb

形態特徵

• An ascending diffused herb, up to 20 cm tall. Stem guadranglar, purple.
• Leaves opposite, subsessile, oblanceolate or narrowly oblanceolate, up to 2.5 cm long, 0.5 cm wide, the apex acute, the base acuminate.
• Flowers axillary, solitary, sessile, 2-bracteate, lanceolate; calyx compulate, 4-lobed, with tailed-appendage; corolla pale purple, elliptic, obtuse or emarginate at apex; stamen 4, adnate to half below tube, opposite to sepals; pistil short; ovary ovate.
• Capsules ovate, brown, 4 mm long; seeds elliptic, verucate, 0.5 mm long.

分布

• 台灣 : Recently naturalized into paddy fields.
• 世界 : Native of North America.

引證標本

HUALIEN: Chian, Huang & Wu 15097*, 15112.

參考文獻

• HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 881. .  (Fl. Taiwan 2nd edit.)