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Ostrya virginiana subsp. lasia (Fernald) A.E. Murray

Kalmia
Rank:Subspecies
Family: Betulaceae

Ostrya knowltonii subsp. chisosensis (Correll) A.E. Murray

Kalmia
Status:Synonym of Ostrya chisosensis Correll
Rank:Subspecies
Family: Betulaceae

Alnus viridis subsp. maximowiczii (Callier ex C.K. Schneid.) H. Ohba

in Fl. Japan
Status:Synonym of Alnus maximowiczii Callier
Rank:Subspecies
Family: Betulaceae

Alnus viridis subsp. maximowiczii (Callier ex C.K. Schneid.) Hultén

?
Status:Synonym of Alnus maximowiczii Callier
Rank:Subspecies
Family: Betulaceae

Betula papyrifera subsp. humilis (Regel) Hultén

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

Betula pubescens subsp. odorata (Bechst.) Warb.

?
Rank:Subspecies
Family: Betulaceae

Betula platyphylla subsp. minutifolia (Kozhevn.) Kozhevn.

Novosti Sist. Vyssh. Rast.
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Betula cajanderi subsp. minutifolia Kozhevn.

Bot. Zhurn. (Moscow & Leningrad)
Rank:Subspecies
Family: Betulaceae

Alnus acuminata subsp. arguta (Schltdl.) Furlow

Ann. Missouri Bot. Gard.
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Alnus alnobetula subsp. fruticosa (Rupr.) Raus

Willdenowia
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Betula utilis subsp. jacquemontii (Spach) Kitam.

Pl. West Pak. Afgh.
Rank:Subspecies
Family: Betulaceae

Betula tianschanica subsp. margusarica (V.N.Vassil.) Ovcz.

in Fl. Tadzhikskoi SSR
Rank:Subspecies
Family: Betulaceae

Alnus alnobetula subsp. sinuata (Regel) Raus

Willdenowia
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Betula verrucosa subsp. obscura (Kotula ex Fiek) Á.Löve & D.Löve

Bot. Not.
Status:Synonym of Betula × aurata Borkh.
Rank:Subspecies
Family: Betulaceae

Betula verrucosa subsp. oycowiensis (Besser) Nyman

Consp. Fl. Eur.
Rank:Subspecies
Family: Betulaceae

Betula verrucosa subsp. fallax Kindb.

Bot. Not.
Status:Synonym of Betula pendula Roth
Rank:Subspecies
Family: Betulaceae

Betula verrucosa subsp. ambigua Hampe ex Kindb.

Bot. Not.
Status:Synonym of Betula pendula Roth
Rank:Subspecies
Family: Betulaceae

Betula verrucosa subsp. borealis Kindb.

Bot. Not.
Status:Synonym of Betula pendula Roth
Rank:Subspecies
Family: Betulaceae

Betula odorata subsp. integrifolia Larss. ex Kindb.

Bot. Not.
Rank:Subspecies
Family: Betulaceae

Betula tricholepidea subsp. stenoptera Kindb.

Bot. Not.
Rank:Subspecies
Family: Betulaceae

Betula procurva subsp. lipskyi (V.N.Vassil.) Ovcz.

in Fl. Tadzhikskoi SSR
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Betula lenta subsp. lenta

Unknown
Status:Synonym of Betula lenta L.
Rank:Subspecies
Family: Betulaceae

Betula lenta subsp. uber (Ashe) A.E.Murray

Kalmia
Status:Accepted Name
Rank:Subspecies
Family: Betulaceae
Order: Fagales

Betula procurva subsp. procurva

Unknown
Status:Synonym of Betula procurva Litv.
Rank:Subspecies
Family: Betulaceae