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Wind Cave National Park False Gromwell Seedling
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Wind Cave National Park
Seed Study - Marrubium vulgare
Marrubium vulgare - White Horehound

NPS Photo

Marrubium vulgare - White Horehound

Species: Marrubium vulgare
Common name: white horehound

Seedling Identification: Cotyledons are rounded and pubescent. True leaves wrinkled, distinctly veined and covered with whitish pubescence.

 

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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 28, 2007 at 12:07 MST