About Nabalus trifoliolatus Cass.
Nabalus trifoliolatus Cass., with the synonym Prenanthes trifoliolata, is commonly known as gall-of-the-earth or three-leaved rattlesnake root. It is a species of flowering plant in the Asteraceae family, and it is native to eastern Canada and the eastern United States. This perennial plant can reach a height of 5 ft (1.5 m).