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| Trees and shrubs with narrow cross stripes, sometimes peeling. Leaves simple mostly double-toothed. Fruit a catkin. | |
| Flora of North America: Discussion, key to genera (opens new window) | |
| Flower Formula: Sepals 0 or 4; Petals 0 | Glossary |
| Genus (Click for Taxon List) |
WI Taxa (map link) |
Photo | Genus Traits | Google Searches |
|---|---|---|---|---|
| Alnus
alder |
3 |  |
Tree or shrub with catkins becoming woody. Usually short. | Images Information |
| Betula
birch |
11 |  |
Tree (1 shrub) with elongated catkins. Bark often peeling. | Images Information |
| Carpinus
hornbeam, ironwood |
1 |  |
Tree with smooth, muscular, blue-grey bark. | Images Information |
| Corylus
filbert, hazel, hazelnut |
2 |  |
Brushy shrub. Fruit a nut. | Images Information |
| Ostrya
hop-hornbeam, ironwood |
1 |  |
Tree with rough, flaky bark. Fruit a cone-like cluster of seeds. | Images Information |