''Nabalus altissimus'' (formerly ''Prenanthes altissima''), commonly called the tall rattlesnakeroot or white lettuce, is a species of plant in the family Asteraceae. In 2010 it was reclassified from the genus ''

Prenanthes ''Prenanthes'' is a genus of plant in the family Asteraceae, often referred to as rattlesnake root. Molecular analysis in 2009 revealed that the genus as traditionally envisioned is polyphyletic, meaning that it is a conglomeration of species ...

'' to ''

Nabalus ''Nabalus'' is a genus of Asian and North American flowering plants in the tribe Cichorieae within the family Asteraceae. ''Nabalus'' is now considered the correct name for a group of plants in North America that were formerly considered to be m ...

''.

Habitat

This perennial grows in

mesic Mesic may refer to: * Mesic, North Carolina, a town in the United States * Mesic habitat, a type of habitat See also *Mesić (disambiguation) *Mešić Mešić is a Bosnian surname, a patronymic derived from the masculine given name '' Meša'', it ...

environments including riparian zones and blooms in late summer and autumn.Yatskievych, G. 2006. Steyermark's Flora of Missouri. 3 Vols. The Missouri Botanical Garden Press, St. Louis, MO, USA. Vol. 2: 377-382Singhurst, J.R., O’Kennon, R.J., Holmes, W.C. 2004. The genus Prenanthes (Asteraceae:Lactuceae) in Texas. Sida 21(1):181–191.

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.

References

altissimus Flora of the Eastern United States Flora of the Appalachian Mountains Taxa named by Augustin Pyramus de Candolle Taxa named by André Michaux {{Cichorieae-stub