Features
Perennial.
Species |
Perrenial |
Living space |
Lake, Pond, River edge, Swamp, Wet site |
Size |
from 30 to 80 cm |
Description
The stem is quadrangular at the base, round at the top. Leaves ovate-lanceolate, opposite, stalked. Flowers 6 to 10 mm wide, corolla as long as the calyx. Common among shrubs on banks, along springs and ditches.