Senecio compactus (A. Gray) Rydberg ex Porter & Britton nom. illeg.

Senecio compactus (A. Gray) Rydberg ex Porter & Britton nom. illeg. is a synonym sensu FNA Ed. Comm., 2006b of:

Packera tridenticulata (Rydberg) W.A. Weber & Á. Löve, an accepted species name sensu FNA Ed. Comm., 2006b.