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Nabalus asper

Nabalus asper, commonly called the rough rattlesnakeroot or rough white lettuce, is a species of plant in the Asteraceae family occurring in the eastern United States from South Dakota and Pennsylvania south to Oklahoma, Louisiana, and Alabama. This plant is a perennial and blooms in late summer and autumn. In 2010 it was reclassified from the genus Prenanthes to Nabalus.