• 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.

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