Family: Betulaceae
[Alnus glauca Michx., more..., Alnus incana f. tomophylla (L.) Moench, Alnus incana var. americana (L.) Moench, Alnus rugosa (Du Roi) Spreng., Alnus rugosa var. americana (Du Roi) Spreng., Alnus rugosa var. tomophylla (Du Roi) Spreng., Betula alnus var. rugosa L.]
University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)