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 sessile, stem-clasping, entire to dentate, with fine teeth. Stems hollow. Flowers, 15–40 in racemes 30–80 cm long. Corolla 5–6 mm diam., pale blue. Widespread. Wet places. Introd. from Europe. Fl. spring–summer. Water Speedwell Veronica anagallis-aquatica
Leaves petiolate, lanceolate to narrow-ovate, or triangular, coarsely serrate, acute. Stems solid. Racemes up to 17 cm long with up to 20 flowers