Spiraea densiflora Nuttall ex Rydberg, nom. illeg.

Spiraea densiflora Nuttall ex Rydberg, nom. illeg. is a synonym sensu FNA Ed. Comm., 2014 of:

Spiraea splendens var. rosea (A. Gray) Kartesz & Gandhi, an accepted variety name sensu FNA Ed. Comm., 2014.