Specimen data from the Consortium of California Herbarium
Betula occidentalis
Betula occidentalisHook.
Family: Betulaceae
water birch
[Betula alba subsp. occidentalis (Hook.) Regel, moreBetula beeniana A. Nelson, Betula fontinalis Sarg., Betula microphylla var. occidentalis (Hook.) M.E.Jones, Betula occidentalis var. fecunda Fernald, Betula occidentalis var. inopina (Jeps.) C.L. Hitchc., Betula papyracea var. occidentalis (Hook.) Dippel, Betula papyrifera subsp. occidentalis (Hook.) Hultén, Betula papyrifera var. occidentalis (Hook.) Sarg.]