Achillea nigrescens (E. Meyer) Rydberg
Achillea nigrescens (E. Meyer) Rydberg is a synonym sensu FNA Ed. Comm., 2006a of:
Achillea borealis Bongard var. borealis, an accepted variety name sensu TROPICOS.
Achillea nigrescens (E. Meyer) Rydberg is a synonym sensu FNA Ed. Comm., 2006a of:
Achillea borealis Bongard var. borealis, an accepted variety name sensu TROPICOS.