Species in the genus Pilea:

Pilea japonica / Yamamizu
Pilea peploides / Kokemizu
Pilea petiolaris / Miyamamizu
Pilea pseudopetiolaris / Komiyamamizu
Pilea pumila / Aomizu　

Pilea pumila / Aomizu アオミズ

Pilea pumira, an annual, the whole being green, occurs in damp, shady places. Stems are erect, 30-50cm in length. The leaves are of opposite phyllotaxis, with long petioles, diamond-shaped ovate, coarse serrations on the margins, and three prominent surface veins. At the axles, mingle male and female flowers. The flowers are green, and many females tinge red. Bloom time: July-October.