• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - Russian Thistle

Russian Thistle - Salsola iberica
Russian Thistle - Salsola iberica
NPS Photo by Jim Pisarowicz
 
Russian Thistle seeds are spread as the mature planets break off at ground level. The wind then blows the plant around as a tumbleweed, spreading the Russian Thistle's seeds. Russian Thistle was introduced in the late 1800s from Russia.

Did You Know?

boxwork

Wind Cave is one of the longest caves in the world and has an amazing amount of a rare cave formation called boxwork. More...