Nabalus altissimus

Nabalus altissimus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Nabalus
Species:	N. altissimus
Binomial name
Nabalus altissimus (L.) Hook.
Synonyms
Prenanthes altissimaL.

Nabalus altissimus (formerly Prenanthes altissima), commonly called the tall rattlesnakeroot or white lettuce, is a perennial wildflower and herb in the family Asteraceae native to the eastern United States. ^[1] In 2010 it was reclassified from the genus Prenanthes to Nabalus . ^[2]

Habitat

This perennial grows in mesic environments including riparian zones. It often grows in forests composed of Sugar Maple ( Acer saccharum ), American Basswood ( Tilia americana ), and American Beech ( Fagus grandifolia ). ^[1] . It blooms in late summer and autumn. ^{[3] [4]}

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. ^{[3] [4]} In Texas, it occurs in Jasper and Newton counties in the extreme southeastern part of the state. ^[4]

References

1. "Nabalus altissimus (Tall White Lettuce, Rattlesnake Root)". NC State Extension Plant Toolbox. North Carolina State University. Retrieved 2025-06-27.
2. "ITIS - Report: Prenanthes altissima".
3. Yatskievych, G. 2006. Steyermark's Flora of Missouri. 3 Vols. The Missouri Botanical Garden Press, St. Louis, MO, USA. Vol. 2: 377-382
4. Singhurst, J.R., O’Kennon, R.J., Holmes, W.C. 2004. The genus Prenanthes (Asteraceae:Lactuceae) in Texas. Sida 21(1):181–191.