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Photographer: Kenneth J. Sytsma
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Family Betulaceae
Alnus incana (L.) Moench subsp. rugosa (Du Roi) R.T.Clausen
mountain alder, speckled alder, swamp alder
Alnus: ancient Latin name derived from the Celtic, "growth along streams"
incana: gray
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| Status: | Native |
| Plant: | perennial tree/shrub to 30' tall with open, spreading branches; dark gray to reddish brown, smooth bark with whitish, prominent, horizontal lenticels; often in dense thickets |
| Flower: | elliptical winter buds stalked and parallel to the twig; male catkin in 1 or more clusters 3/4"-2 3/4" long; blooms in early spring |
| Fruit: | oval, stalked fruit clusters |
| Leaf: | leaf oval to elliptic, firm, edges usually coarsely double toothed, not noticeably resin-coated |
| Habitat: | moist to wet; streambanks, lakeshores, bogs, swamps, swales and roadsides |
| (Glossary) |
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 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Botanical Illustration&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Derek Anderson&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Matthew L. Wagner&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Matthew L. Wagner&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Matthew L. Wagner&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Matthew L. Wagner&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Robert H. Read&spcode=ALNINCsRUG)
 Moench subsp. rugosa (Du Roi) R.T.Clausen&phog=Robert W. Freckmann&spcode=ALNINCsRUG)
