Achillea borealis subsp. arenicola (A. Heller) D. D. Keck

Achillea borealis subsp. arenicola (A. Heller) D. D. Keck is a synonym sensu FNA Ed. Comm., 2006a of:

Achillea borealis Bongard var. borealis, an accepted variety name sensu TROPICOS.