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Betula crassijulis Muscheg.

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Status:Synonym of Betula tianschanica Rupr.
Rank:Species
Family: Betulaceae

Betula papyrifera subsp. humilis (Regel) Hultén

Fl. Alaska
Status:Synonym of Betula neoalaskana Sarg.
Rank:Subspecies
Family: Betulaceae

Betula × piperi C.L. Hitchc.

Advis. Leafl. Bot. Branch
Status:Accepted Name
Rank:Species
Family: Betulaceae
Order: Fagales

Betula × eastwoodiae Dugle

Canad. J. Bot.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula × utahensis Dugle

Canad. J. Bot.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Carpinus polyneura var. glanduloso-punctata C.J. Qi

Acta Phytotax. Sin.
Status:Synonym of Carpinus polyneura Franch.
Rank:Variety
Family: Betulaceae

Betula × sukaczevii Soczeva

Ochr. Fitos. Fitogeogr.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus frangula L. ex Huth

Helios
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus fernandi-coburgii C.K. Schneid.

Bot. Gaz.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus laciniata Ehrh.

Beitr. Naturk.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus glutinosa f. quercifolia Willd.

Berlin. Baumz.
Rank:Form
Family: Betulaceae

Alnus hybrida Rchb.

Icon. Fl. Germ. Helv.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus lobata Nyman

Consp. Fl. Eur.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus washinhtonia Wetzel

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Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula platyphylla var. kamtschatica (Regel) Hara

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Rank:Variety
Family: Betulaceae

Alnus glauca Michx.

Hist. Arbr. Forest.
Rank:Species
Family: Betulaceae

Alnus rugosa var. tomophylla (Fernald) Fernald

Rhodora
Rank:Variety
Family: Betulaceae

Betula viridis Vill.

Hist. Pl. Dauphiné
Rank:Species
Family: Betulaceae

Betula alba var. cordifolia (Regel) Fernald

Amer. J. Sci., ser. 4
Rank:Variety
Family: Betulaceae

Betula andrewsii A. Nelson

Bot. Gaz.
Status:Synonym of Betula × utahensis Dugle
Rank:Species
Family: Betulaceae

Betula × conmixta Sarg.

Man. Tr. N. Am.
Status:Synonym of Betula × utahensis Dugle
Rank:Species
Family: Betulaceae

Alnus obtusifolia Mert. ex Regel

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Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus glandulosa Sarg.

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Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula × baicalensis Sukaczev

Izv. Imp. Akad. Nauk
Status:Ambiguous
Rank:Species
Family: Betulaceae