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Wind Cave National Park False Gromwell Seedling
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Wind Cave National Park
Seed Study - Ambrosia psilostachya
Ambrosia psilostachya - Western Ragweed

Ambrosia psilostachya - Western Ragweed

Species: Ambrosia psilostachya
Common name: western ragweed

Seedling identification: First leaves are tri-lobed and coarsely pubescent. Sharp outward pointing hairs line the leaf margin.

 

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Natural Entrance of Wind Cave

Did You Know?
Winds caused by changes in barometric pressure are what give Wind Cave its name. These winds have been measured at the cave's walk-in entrance at over 70 mph. The winds at the natural entrance of the cave attracted the attention of Native Americans and early settlers.
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Last Updated: September 08, 2007 at 12:43 MST