Blue vervain (swamp vervain)
Native American Name
Verbena hastata is a(n) perennial herb, which grows 0.4 m to 1 m in height. This species is commonly found at low to mid elevations, more common in the southern Black Hills than elsewhere; stream banks, shores, wet meadows, and springs. The leaves are opposite, short-petioled; blades lanceolate to ovate-lanceolate or elliptic-lanceolate, occasionally lobed near base, roughened. Verbena hastata has dark blue to a purple flowers that bloom from July to September.