Veronica L.

Herbs, sometimes rooting at the nodes Veronica
Leaves less than 25 mm long. Stems creeping and rooting at the nodes or, if erect, then up to 30 cm high
Leaves coarsely serrate, crenate or crenate-dentate
Flowers nearly sessile in terminal racemes. Calyx 2–3 mm long when in flower. Corolla minute. Leaves ovate, cordate, crenate-dentate, 5–8 mm long. Widespread. Weed of cultivation, waste places and grasslands. Introd. from Europe. Fl. spring–summer Veronica arvensis
Flowers in axillary racemes or solitary in the axils of the upper leaves