Alnus glutinosa
BLACK ALDER
- Pyramidal to oval growth habit
- Oval to rounded leaves, uneven double-toothed margins
- Drooping male catkins form in the fall and overwinter on the tree
HEIGHT: 16-18 m · SPREAD: 10-12 m
Alnus rugosa
SPECKLED ALDER
- Pyramidal to oval growth habit
- Noted for its speckled bark
- Oval to rounded leaves, margins uneven and double-toothed
HEIGHT: 13-15 m · SPREAD: 8-10 m