Yellow Birch | Native Tree | Johnson's Nursery | Knowledgebase
Betula nigra (river birch): Go Botany
Betula pendula (Common Birch, European Birch, European Weeping Birch, European White Birch, Silver Birch, Warty Birch) | North Carolina Extension Gardener Plant Toolbox
Betula lenta (cherry birch): Go Botany
Betula pendula | Landscape Plants | Oregon State University