Betula papyrifera var. subcordata (Rydberg ex B.T. Butler) Sargent

Betula papyrifera var. subcordata (Rydberg ex B.T. Butler) Sargent is a synonym sensu FNA Ed. Comm., 1997 of:

Betula papyrifera Marshall, an accepted species name sensu FNA Ed. Comm., 1997.