生活型

herb

形態特徵

• A procumbent herb; branches slender, 4-angled, sparsely short barbed.
• Leaves sessile, 4-verticillate, narrowly oblanceolate to oblanceolate, (3-)4–8(–9) mm long, 1–3 mm wide, sparsely short barbed abaxially; margins sparsely short barbed; apex round or obtuse, base attenuate; main vein 1.
• Flowers 1–1.5 mm in diam., pedicel 3–9 mm long; corolla rotate, 3-lobed, lobes ovate; ovary glabrous.
• Fruit glabrous.

分布

• 台灣 : limited to wet places in the northern lake districts.
• 世界 : Widely distributed in the temperate northern hemisphere, including Europe, North America, China, Japan.

引證標本

Ilan: Tatung, Lu 22143; Shenmihu, Lu 20776. HSINCHU: Yuanyanghu, Chen & Liao 161.

引用文獻

• LIU, Ho-Yih, YANG, T. Y. Aleck, LI, Sung-Po and LI, Hen-Jung, Flora of Taiwan, second edition 4: 259. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)