• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - Western Yarrow

Western Yarrow - Achillea millefolium
Western Yarrow - Achillea lanulosa
NPS Photo by Jim Pisarowicz
Two kinds of yarrow may be found in the Black Hills. Western Yarrow is the most frequently seen. Common Yarrow is a Eurasian species.

Did You Know?

fire on the prairie

Fire is an important factor in protecting the prairie. Historically, fires burned across the prairie every 4 to 7 years. Fires burn the small trees that would otherwise march across the prairie and turn the grasslands to forest.