White vervain has opposite, simple leaves on thin, rigid, green stems.

The serrated leaves look similar to those of Urtica, which is the reason for the plant being named urticifolia.

The small flowers are borne in spikes; they open in summer and unusually for this normally bluish-flowered genus are white.

White vervain is native to eastern North America, excluding Mexico.

[2] White vervain is commonly found growing individually in disturbed areas with partial shade.