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Betula sect. Fruticosae
Betula subg. Fruticosae
Betula subsect. Chinenses
Betula subg. Chinenses
Betula subg. Asperae
Betula subsect. Asperae
Betula sect. Asperae
Betula ermanii var. ermanii
Betula sect. Betulaster
Betula subg. Betulaster
Betula sect. Acuminatae
Betula potaninii var. potaninii
Betula cylindrostachys
Betula sect. Betula
Betula sect. Eubetula
Betula subsect. Betula
Betula subsect. Albae
Betula sect. Albae
Betula subsect. Eualbae
Betula subg. Albae
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