Veronica L.

Herbs, sometimes rooting at the nodes Veronica
Leaves mostly more than 30 mm long, usually more than 10 mm wide. Stems ascending usually more than 30 cm high from creeping or decumbent stolons. Flowers usually numerous, in axillary racemes
Leaves less than 25 mm long. Stems creeping and rooting at the nodes or, if erect, then up to 30 cm high