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Much like no. 17 [Veronica anagallis-aquatica L.], often finely stipitate-glandular upwards; lvs entire or subentire, (2.5–)3–5(–8) times as long as wide; racemes often with fewer fls; fls white to pink or pale bluish, 3–5 mm wide; sep less variable, mostly broader and blunter; fruiting pedicels divaricately spreading; fr mostly a little wider than high, sometimes more evidently notched; petiolate-lvd autumnal shoots not formed; 2n=36. Slow-flowing streams and ditches; widespread in the U.S. and s. Can., and in Eurasia.
A herb. It can grow up to 1 m tall. The stems sprawl in loose mats. The leaves are 2-10 cm long and 1-5 cm wide. They are opposite and clasp the stem. The flowers are at the top of the plant and in the axils of leaves. The flowers are 4-6 mm across and white, pink or pale blue.
