• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - Blue Vervain

Blue Vervain, Swamp Vervain - Verbena hastata
Blue Vervain, Blue Verbena, Swamp Vervain - Verbena hastata
NPS Photo by Jim Pisarowicz
Blue Vervain prefers to grow in open moist areas.

Did You Know?

A picture of Alvin McDonald in his caving hat.

Alvin McDonald was the first systematic explorer of Wind Cave. He explored the cave from 1890 until his death in 1893. More...