Nabalus altissimus

Nabalus altissimus, commonly called the tall rattlesnakeroot or white lettuce, is a perennial wildflower and herb in the family Asteraceae native to the eastern United States. In 2010 it was reclassified from the genus Prenanthes to Nabalus.

Habitat

This perennial grows in mesic environments including riparian zones. It often grows in forests composed of Sugar Maple, American Basswood, and American Beech. It blooms in late summer and autumn.

Range

This species occurs in the eastern United States west to Michigan, Missouri, and Texas as well as in Quebec, Canada but is unknown in Mississippi, and Florida. In Texas, it occurs in Jasper and Newton counties in the extreme southeastern part of the state.