Alnus
Alnus glutinosa, Alnus incana, Alnus rhombifolia, Alnus rubra, Alnus rugosa, Alnus serrulata, Alnus viridis, Alnus crispa (Green Alder), Alnus maritima (Seaside Alder), Alnus nepalensis
Betula
Betula alleghiensis, Betula lenta, Betula nigra, Betula occidentalis, Betula papyrifera, Betula pendula, Betula populifolia, Betula neoalaskana (Alaska Paper Birch), Betula pumila
Corylus
Corylus americana (American Hazel), Corylus americana (American Hazel), Corylus avellana, Corylus cornuta var. californica
Ostrya
Ostrya knowltonii, Ostrya virginiana, Ostrya virginiana (Eastern Hophornbeam), Ostrya virginiana (Eastern Hophornbeam)
Betulaceae
Describes the distinguishing characteristics of the birch family, comprising 6 genera.
Description of Betulaceae
Account of the family, including habit and leaf form, anatomy, morphology, physiology, biochemistry and geography.