Nabalus asper (formerly Prenanthes aspera), commonly called the rough rattlesnakeroot or rough white lettuce, is a species of plant in the family Asteraceae...

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...

Nabalus albus, the white rattlesnake-root, also known as Boott's rattlesnake-root or white lettuce, is a plant in the family Asteraceae, native to Canada...