Polymnia johnbeckii, commonly called Beck's leafcup,[2][3][4] is a species of flowering plant in the family of Asteraceae.

It is a perennial forb found in a single state of the United States.

It has white/yellow flowers.

Polymnia johnbeckii is found in only one of the United States in the state of Tennessee.

Its global conservation status is critically imperiled [1] per Natureserve.