| Kingdom | Plantae | Plants, but not fungi, lichens, or algae |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Fagales | Birch, she-oak, beech, walnut, bayberry, others |
| Family | Betulaceae | Birch family: birches, alders, hazels, hornbeams and hop-hornbeams |
| Genus | Betula | Birch |
| Species | occidentalis | From the west, western |
Betula papyrifera Marsh. ssp. occidentalis (Hook.) Hultén
Betula papyrifera Marsh. var. occidentalis (Hook.) Sarg.
Betula beeniana A. Nelson
Betula fontinalis Sarg.
Betula occidentalis Hook. var. inopina (Jeps.) C.L. Hitchc.
Betula papyrifera Marsh. ssp. occidentalis (Hook.) Hultén
Betula papyrifera Marsh. var. occidentalis (Hook.) Sarg.
Betula papyrifera Marshall ssp. occidentalis (Hook.) Hultén
Betula papyrifera Marshall var. occidentalis (Hook.) Sarg.
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