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Ostrya quatemalensis Rose

Contr. U.S. Natl. Herb.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula cylindrostachys Wall. ex Diels

Bot. Jahrb. Syst.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula hornei B.T. Butler

Bull. Torrey Bot. Club
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula sandbergii Britton

Bull. Torrey Bot. Club
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula × eastwoodiae Dugle

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

Betula × utahensis Dugle

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

?
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus obtusifolia Mert. ex Regel

?
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus glandulosa Sarg.

?
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula × baicalensis Sukaczev

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

Betula camtschatica Regel

Nouv. Mém. Soc. Imp. Naturalistes Moscou
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula jackii C.K. Schneid.

?
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula medwedieaii Regel

Gartenflora
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus figerti Callier

Deutsche Bot. Monatsschr.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Alnus × ljungeri Murai

Bull. Gov. Forest Exp. Sta.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula angulata Steud.

Nomencl. Bot. (ed. 2)
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula borggreveana Zabel ex H. Winkl.

Pflanzenr.
Status:Ambiguous
Rank:Species
Family: Betulaceae

Betula oxytzowiensis Dippel

Handb. Laubholzk.
Status:Ambiguous
Rank:Species
Family: Betulaceae