Photo: Verbena urticifolia.

Flowering tops. Helsinki bot.g. (Kaisan.), Finland. Planted. 2006-08-08.
Verbena urticifolia L. Engl.: white vervain, nettle-leaved vervain. Deu.: Nesselblättriges Eisenkraut. Sven.: amerikansk järnört
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Photo: Verbena urticifolia.