Polemonium boreale var. macranthum (Chamisso) Tzvelev
Polemonium boreale var. macranthum (Chamisso) Tzvelev is a synonym sensu IPNI of:
Polemonium villosissimum (Hultén) D.F. Murray & Elven, an accepted species name sensu FNA Ed. Comm., in prep. h.