• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - White Horehound

White Horehound - Marrubium vulgare
White Horehound - Marrubium vulgare
NPS Photo by Marie Curtin

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.