Achillea millefolium var. occidentalis de Candolle
Achillea millefolium var. occidentalis de Candolle is a synonym sensu FNA Ed. Comm., 2003a of:
Achillea borealis Bongard var. borealis, an accepted variety name sensu TROPICOS.
Achillea millefolium var. occidentalis de Candolle is a synonym sensu FNA Ed. Comm., 2003a of:
Achillea borealis Bongard var. borealis, an accepted variety name sensu TROPICOS.