blue vervain

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blue vervain

plant

Also known as: Verbena hastata

Learn about this topic in these articles:

Verbena

In verbena
The blue vervain (V. hastata) reaches a height of 1.5 metres (5 feet) and produces spikes of blue to purple flowers. The Eurasian species V. officinalis, the herb of the cross, was once considered a medicinal plant.
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