Potentilla rivalis var. pentandra (Engelmann ex Torrey & A. Gray) S. Watson

Potentilla rivalis var. pentandra (Engelmann ex Torrey & A. Gray) S. Watson is a synonym sensu FNA Ed. Comm., 2014 of:

Potentilla rivalis Nuttall, an accepted species name sensu FNA Ed. Comm., 2014.