This taxon is the broad-leaved segregate of senega that occurs in rocky subxeric to mesic woods of east-central states. It has been previously known as P. senega var. latifolia Torr. & Gray, but species status has been suggested by Trauth-Nare & Naczi (1998), and is favored for this Atlas. Trauth-Nare has labelled these plants as P. lonchophylla Greene, but more work is needed to ensure proper typification.