Betula alba subsp. populifolia (Marshall) Regel
Betula alba subsp. populifolia (Marshall) Regel is a synonym sensu FNA Ed. Comm., 1997 of:
Betula populifolia Marshall, an accepted species name sensu FNA Ed. Comm., 1997.
Betula alba subsp. populifolia (Marshall) Regel is a synonym sensu FNA Ed. Comm., 1997 of:
Betula populifolia Marshall, an accepted species name sensu FNA Ed. Comm., 1997.