1. Medium-sized birch of eastern North America having white or pale grey bark and valueless wood; occurs often as a second-growth forest tree
   "Betula populifolia quickly colonized the abandoned field";
   - grey birch [Brit, Cdn], gray birch [US], American grey birch [Brit, Cdn], American gray birch [US]

Type of: birch, birch tree

Part of: Betula, genus Betula

Encyclopedia: Betula populifolia