The Plant List — A working list for all plant species

⚠ Version 1 of The Plant List has been superseded.

You should refer instead to the current version of The Plant List.

Results

943 plant name records match your search criteria Betula. The results are below.

• Genus Betula is in the family Betulaceae. Species epithets begin with: A B C D E F G H I J K L M N O P Q R S T U V W Y Z

The results can also be downloaded as a CSV file.

See "Status", "Confidence level", "Source" for definitions.

Name	Status	Confi­dence level	Source
Betula abolinii Sukaczev [Invalid]	Synonym		WCSP
Betula acuminata Kindb. [Unplaced]	Unresolved		WCSP
Betula acuminata Wall. [Illegitimate]	Synonym		WCSP
Betula acuminata Ehrh.	Synonym		WCSP
Betula acuminata var. argula Regel	Synonym		TRO
Betula acuminata var. arguta Regel	Synonym		WCSP
Betula acuminata var. cylindrostachya (Lindl. ex Wall.) Regel	Synonym		WCSP
Betula acuminata var. glabra Regel	Synonym		WCSP
Betula acuminata var. lancifolia Regel	Synonym		WCSP
Betula acuminata var. pilosa Regel	Synonym		WCSP
Betula acuminata var. pyrifolia Franch.	Synonym		WCSP
Betula acuminatifolia V.N.Vassil.	Synonym		WCSP
Betula adasii T.V.Egorova & Sipliv.	Synonym		WCSP
Betula aetnensis Raf. ex J.Presl & C.Presl [Spelling variant]	Synonym		WCSP
Betula affinis (Spach) Endl.	Synonym		WCSP
Betula aischatiae E.S.Husseinov	Synonym		WCSP
Betula ajanensis Kom.	Synonym		WCSP
Betula alajica Litv.	Accepted		WCSP
Betula alaskana Sarg. [Illegitimate]	Synonym		WCSP
Betula alatavica Musch.	Synonym		WCSP
Betula alatavica Muscheg.	Synonym		TRO
Betula alba L.	Synonym		WCSP
Betula alba var. aetherea Wallr.	Synonym		WCSP
Betula alba subsp. arborescens Wallr.	Synonym		WCSP
Betula alba var. arbuscula Fr.	Synonym		WCSP
Betula alba var. atropurpurea Dippel	Synonym		WCSP
Betula alba var. bircalensis (Mela) Mela	Synonym		WCSP
Betula alba var. camtschatica Regel	Synonym		WCSP
Betula alba var. carelica Merckl.	Synonym		WCSP
Betula alba var. carelica Merklein	Synonym		TRO
Betula alba var. carpatica (Waldst. & Kit. ex Willd.) Regel	Synonym		WCSP
Betula alba var. communis Shirai	Synonym		WCSP
Betula alba var. commutata Regel	Synonym		WCSP
Betula alba var. cordifolia (Regel) Regel	Synonym		WCSP
Betula alba var. cordifolia (Regel) Fernald	Synonym		TRO
Betula alba f. dalecarlica (L.f.) Regel	Synonym		WCSP
Betula alba var. dalecarlica L.f.	Synonym		WCSP
Betula alba var. elobata Fernald	Synonym		WCSP
Betula alba subsp. excelsa (Aiton) Regel	Synonym		WCSP
Betula alba var. fastigiata Clemenc.	Synonym		WCSP
Betula alba var. friesii Regel	Synonym		WCSP
Betula alba var. glabrata (Wahlenb.) Muñoz Garm. & Pedrol	Synonym		WCSP
Betula alba subsp. glutinosa (Trautv. ex Regel) Holub	Synonym		WCSP
Betula alba var. glutinosa Trautv. ex Regel	Synonym		WCSP
Betula alba var. hornemannii Regel	Synonym		WCSP
Betula alba f. hornemannii (Regel) Regel	Synonym		WCSP
Betula alba var. humilis Regel	Synonym		WCSP
Betula alba var. intermedia (Hartm.) Wahlenb.	Unresolved		WCSP
Betula alba var. japonica Miq.	Synonym		WCSP
Betula alba var. kamtschatica Regel	Synonym		WCSP
Betula alba f. laciniata (de Vos) Dippel	Synonym		WCSP
Betula alba subsp. latifolia (Tausch) Regel	Synonym		WCSP
Betula alba f. lobata Regel	Synonym		WCSP
Betula alba var. lobulata C.Andersson	Synonym		WCSP
Betula alba var. lupulina Wallr.	Synonym		WCSP
Betula alba var. macrocarpa Willd.	Synonym		WCSP
Betula alba subsp. mandshurica Regel	Synonym		WCSP
Betula alba var. mandshurica (Regel) Franch.	Synonym		WCSP
Betula alba var. microphylla Wallr.	Synonym		WCSP
Betula alba var. microphylla Regel	Synonym		TRO
Betula alba var. microphylla Wimm.	Synonym		TRO
Betula alba var. minor (Tuck.) Fernald	Synonym		WCSP
Betula alba f. occidentalis (Hook.) Fernald	Synonym		WCSP
Betula alba subsp. occidentalis (Hook.) Regel	Synonym		WCSP
Betula alba subsp. odorata (Bechst.) Dippel	Synonym		WCSP
Betula alba var. ovata Neilr.	Synonym		WCSP
Betula alba var. oycowiensis (Besser) Regel	Synonym		WCSP
Betula alba var. papyrifera (Marshall) Spach	Synonym		WCSP
Betula alba subsp. papyrifera (Marshall) Regel	Synonym		WCSP
Betula alba var. parvifolia (Regel) Regel	Synonym		WCSP
Betula alba var. pendula (Roth) W.T.Aiton	Synonym		WCSP
Betula alba var. pontica P.Watson	Synonym		WCSP
Betula alba var. populifolia (Marshall) Spach	Synonym		WCSP
Betula alba subsp. populifolia (Marshall) Regel	Synonym		WCSP
Betula alba var. pubescens (Ehrh.) Spach	Synonym		WCSP
Betula alba subsp. pubescens (Ehrh.) Regel	Synonym		WCSP
Betula alba var. pumila L.	Synonym		WCSP
Betula alba var. resinifera Regel	Synonym		WCSP
Betula alba var. rhombifolia (Tausch) Regel	Synonym		WCSP
Betula alba f. rhombifolia (Tausch) Regel	Synonym		WCSP
Betula alba var. schugnanica B.Fedtsch.	Synonym		WCSP
Betula alba var. songarica Dippel	Synonym		WCSP
Betula alba var. tauschii Regel	Synonym		WCSP
Betula alba subsp. tauschii Regel	Synonym		TRO
Betula alba subsp. tortuosa (Ledeb.) Regel	Synonym		WCSP
Betula alba var. urticifolia Spach	Synonym		WCSP
Betula alba var. verrucosa (Ehrh.) Wallr.	Synonym		WCSP
Betula alba subsp. verrucosa (Ehrh.) Regel	Synonym		WCSP
Betula alba var. vulgaris Aiton	Synonym		WCSP
Betula albosinensis Burkill	Accepted		WCSP
Betula albosinensis var. septentrionalis C.K.Schneid.	Synonym		WCSP
Betula alleghaniensis Britton	Accepted		WCSP
Betula alleghaniensis var. fallax (Fassett) Brayshaw	Synonym		WCSP
Betula alleghaniensis f. macrolepis (Fernald) Brayshaw	Synonym		WCSP
Betula alleghaniensis var. macrolepis (Fernald) Brayshaw	Synonym		WCSP
Betula alnobetula Ehrh.	Synonym		WCSP
Betula alnoides Buch.-Ham. ex D.Don	Accepted		WCSP
Betula alnoides var. acuminata (Spach) H.J.P.Winkl.	Synonym		WCSP
Betula alnoides var. cylindrostachya (Lindl. ex Wall.) H.J.P.Winkl.	Synonym		WCSP
Betula alnoides var. pyrifolia (Franch.) Burkill	Synonym		WCSP
Betula alnus L.	Synonym		WCSP
Betula alnus var. crispa (Aiton) Michx.	Synonym		WCSP
Betula alnus var. glutinosa L.	Synonym		WCSP
Betula alnus var. incana L.	Synonym		WCSP
Betula alnus var. laciniata Aiton	Synonym		WCSP
Betula alnus var. rugosa Du Roi	Synonym		WCSP
Betula alnus var. serrulata (Aiton) Michx.	Synonym		WCSP
Betula alnus-crispa Steud.	Synonym		WCSP
Betula × alpestris Fr.	Accepted		WCSP
Betula × alpina Kindb. [Illegitimate]	Unresolved		WCSP
Betula alpina Borkh. ex Theorin	Synonym		WCSP
Betula ambigua Hampe ex Rchb.	Synonym		WCSP
Betula americana Buc'hoz [Invalid]	Synonym		WCSP
Betula andreji V.N.Vassil.	Synonym		WCSP
Betula × andrewsii A.Nelson	Synonym		WCSP
Betula angulata Steud.	Unresolved		TRO
Betula antarctica G.Forst.	Synonym		WCSP
Betula apoiensis Nakai ex H.Hara	Accepted		WCSP
Betula × arbuscula Dugle	Synonym		WCSP
Betula arguta Schltdl.	Synonym		WCSP
Betula × aschersoniana Hayek [Unplaced]	Unresolved		WCSP
Betula asplenifolia Regel	Synonym		WCSP
Betula × atrata Domin	Synonym		WCSP
Betula × aurata Borkh.	Accepted		WCSP
Betula × aurata var. rhombifolia (Tausch) Tzvelev	Synonym		WCSP
Betula aurea Steud.	Synonym		WCSP
Betula austrosichotensis V.N.Vassil. & V.I.Baranov	Accepted		WCSP
Betula austrosinensis Chun ex P.C.Li	Synonym		WCSP
Betula × avatshensis Kom.	Accepted		WCSP
Betula baeumkeri H.J.P.Winkl.	Synonym		WCSP
Betula baicalensis Sukaczev	Synonym		WCSP
Betula baicalia V.N.Vassil.	Synonym		WCSP
Betula baranovii Sukaczev	Synonym		WCSP
Betula barguzinensis Popov [Illegitimate]	Synonym		WCSP
Betula baschkirica Tzvelev	Accepted		WCSP
Betula beeniana A.Nelson	Synonym		WCSP
Betula bhojpattra Lindl. ex Wall.	Synonym		WCSP
Betula bhojpattra var. glandulifera Regel	Synonym		WCSP
Betula bhojpattra var. jacquemontii (Spach) Regel	Synonym		WCSP
Betula bhojpattra var. japonica Shirai	Synonym		WCSP
Betula bhojpattra var. latifolia Regel	Synonym		WCSP
Betula bhojpattra var. sinensis Franch.	Synonym		WCSP
Betula bhojpattra var. subcordata Regel	Synonym		WCSP
Betula bomiensis P.C.Li	Accepted		WCSP
Betula borealis Spach	Synonym		WCSP
Betula borealis Auth.	Synonym		TRO
Betula × borggreveana Zabel ex H.J.P.Winkl. [Unplaced]	Unresolved		WCSP
Betula bornmuelleri V.N.Vassil.	Synonym		WCSP
Betula borysthenica Klokov	Synonym		WCSP
Betula boshia Buch.-Ham. ex D. Don	Synonym		TRO
Betula × bottnica Mela	Accepted		WCSP
Betula brachylepis V.N.Vassil.	Synonym		WCSP
Betula broccembergensis Bechst.	Synonym		WCSP
Betula bucharica V.N.Vassil.	Synonym		WCSP
Betula × caerulea Blanch.	Accepted		WCSP
Betula × caerulea var. blanchardii Sarg.	Synonym		WCSP
Betula × caerulea var. cunninghamii B.Boivin	Synonym		WCSP
Betula × caerulea var. grandis Blanch.	Synonym		WCSP
Betula × caerulea-grandis Blanch.	Synonym		WCSP
Betula cajanderi Sukaczev	Synonym		WCSP
Betula cajanderi f. fruticans Kozhevn.	Synonym		WCSP
Betula cajanderi subsp. minutifolia Kozhevn.	Synonym		WCSP
Betula calcicola (W.W.Sm.) P.C.Li	Accepted		WCSP
Betula callosa Notø	Synonym		WCSP
Betula callosa Lindq.	Accepted		TRO
Betula camtschatica Regel	Unresolved		TRO
Betula canadensis K.Koch	Synonym		WCSP
Betula candelae Koidz.	Synonym		WCSP
Betula carelica Merk.	Unresolved		TRO
Betula carpatica Waldst. & Kit. ex Willd.	Synonym		WCSP
Betula carpatica var. hercynica Rchb.	Synonym		WCSP
Betula carpatica var. sudetica Rchb.	Synonym		WCSP
Betula carpinifolia Siebold & Zucc. [Illegitimate]	Synonym		WCSP
Betula carpinifolia Ehrh.	Synonym		WCSP
Betula castanae Buch.-Ham. ex Hook.f.	Synonym		WCSP
Betula caucasica Litv. ex Leskov [Invalid]	Synonym		WCSP
Betula celtiberica Rothm. & Vasc.	Synonym		WCSP
Betula ceratoptera G.H.Liu & Y.C.Ma	Accepted		WCSP
Betula chichibuensis H.Hara	Accepted		WCSP
Betula chinensis Maxim.	Accepted		WCSP
Betula chinensis var. angusticarpa H.J.P.Winkl.	Synonym		WCSP
Betula chinensis var. ceratoptera (G.H. Liu & Ma) P.C. Li	Synonym		TRO
Betula chinensis var. delavayi (Franch.) C.K.Schneid.	Synonym		WCSP
Betula chinensis var. fargesii (Franch.) P.C.Li	Synonym		WCSP
Betula chinensis f. linearisquama Hatus.	Synonym		WCSP
Betula chinensis var. linearisquama (Hatus.) S.L.Tung	Synonym		WCSP
Betula chinensis var. nana Liou [Invalid]	Synonym		WCSP
Betula chinensis f. nana (Liou) Kitag.	Synonym		WCSP
Betula chitralica Browicz	Accepted		WCSP
Betula ciliata Steud.	Unresolved		WCSP
Betula collina Nakai [Unplaced]	Unresolved		WCSP
Betula × commixta Sarg.	Synonym		WCSP
Betula concinna Gunnarsson	Synonym		WCSP
Betula × conmixta Sarg.	Synonym		TRO
Betula cordata Loisel.	Synonym		WCSP
Betula cordifolia Regel	Synonym		WCSP
Betula coriacea Pamp. [Unplaced]	Unresolved		WCSP
Betula coriacea Gunnarsson [Illegitimate]	Synonym		WCSP
Betula coriaceifolia V.N.Vassil.	Accepted		WCSP
Betula coriifolia Tausch ex Regel	Synonym		WCSP
Betula corylifolia Griff. [Unplaced]	Unresolved		WCSP
Betula corylifolia Regel & Maxim.	Accepted		WCSP
Betula costata Trautv.	Accepted		WCSP
Betula costata var. pubescens S.L.Liou	Synonym		WCSP
Betula crassijulis Musch.	Synonym		WCSP
Betula crassijulis Muscheg.	Synonym		TRO
Betula crenata Rydb. ex E.J.Butler	Synonym		WCSP
Betula crispa Aiton	Synonym		WCSP
Betula cryptocarpa Laest.	Unresolved		TRO
Betula cuspidata Schrad. ex Regel [Illegitimate]	Synonym		WCSP
Betula cyclophylla Nakai [Unplaced]	Unresolved		WCSP
Betula cycoviensis Steud. [Spelling variant]	Synonym		WCSP
Betula cylindrostachya Lindl. ex Wall.	Accepted		WCSP
Betula cylindrostachya var. pilosa (Regel) Regel	Synonym		WCSP
Betula cylindrostachya var. resinosa Diels	Synonym		WCSP
Betula cylindrostachya var. subglabra Regel	Synonym		WCSP
Betula cylindrostachys Wall. ex Diels	Unresolved		TRO
Betula czatkalensis V.N.Vassil.	Synonym		WCSP
Betula czerepanovii N.I.Orlova	Synonym		WCSP
Betula czerepanovii var. nasarovii Tzvelev	Synonym		WCSP
Betula dahurica Pall.	Accepted		WCSP
Betula dahurica var. americana Regel	Synonym		WCSP
Betula dahurica var. maximowiczii (Rupr.) Trautv.	Synonym		WCSP
Betula dahurica f. oblongifolia (Liou) S.L.Tung	Synonym		WCSP
Betula dahurica var. oblongifolia Liou	Synonym		WCSP
Betula dahurica var. okuboi Miyabe & Tatew.	Synonym		WCSP
Betula dahurica var. ovalifolia Liou	Synonym		WCSP
Betula dahurica f. ovalifolia (Liou) S.L.Tung	Synonym		WCSP
Betula dahurica f. tiliifolia (Liou) S.L.Tung	Synonym		WCSP
Betula dahurica var. tiliifolia Liou	Synonym		WCSP
Betula dalecarlica L.f.	Synonym		WCSP
Betula darvasica Ovcz., Czukav. & Shibkova [Unplaced]	Unresolved		WCSP
Betula davurica Pall.	Unresolved		TRO
Betula delavayi Franch.	Accepted		WCSP
Betula delavayi var. calcicola W.W.Sm.	Synonym		WCSP
Betula delavayi var. forrestii W.W.Sm.	Synonym		WCSP
Betula delavayi var. microstachya P.C.Li	Synonym		WCSP
Betula delavayi var. polyneura L.C.Hu	Synonym		WCSP
Betula demetrii I.V.Vassil.	Synonym		WCSP
Betula derbetica P.A.Baranov	Synonym		WCSP
Betula dioica Pall. [Invalid]	Synonym		WCSP
Betula divaricata Ledeb.	Accepted		WCSP
Betula dolicholepis Ovcz., Czukav. & Shibkova	Accepted		WCSP
Betula × dugleana Lepage	Accepted		WCSP
Betula × dutillyi Lepage	Accepted		WCSP
Betula × eastwoodiae Sarg.	Accepted		WCSP
Betula ellipticifolia V.N.Vassil.	Synonym		WCSP
Betula elrodiana E.J.Butler	Synonym		WCSP
Betula emarginata Ehrh. [Invalid]	Synonym		WCSP
Betula ermanii Cham.	Accepted		WCSP
Betula ermanii var. acutifolia H.J.P.Winkl.	Synonym		WCSP
Betula ermanii var. communis Koidz.	Synonym		WCSP
Betula ermanii var. corticosa Nakai	Synonym		WCSP
Betula ermanii f. corticosa (Nakai) Sugim.	Synonym		WCSP
Betula ermanii var. costata (Trautv.) Regel	Synonym		WCSP
Betula ermanii var. ermanii	Accepted		WCSP
Betula ermanii f. ganjuensis (Koidz.) T.Shimizu	Synonym		WCSP
Betula ermanii var. ganjuensis (Koidz.) Nakai	Synonym		WCSP
Betula ermanii var. incisa Koidz.	Synonym		WCSP
Betula ermanii var. japonica (Shirai) Koidz.	Accepted		WCSP
Betula ermanii subsp. lanata (Regel) A.Skvorts.	Synonym		WCSP
Betula ermanii var. lanata Regel	Synonym		WCSP
Betula ermanii var. macrostrobila Liou	Synonym		WCSP
Betula ermanii var. nipponica Maxim.	Synonym		WCSP
Betula ermanii f. nipponica (Maxim.) Koidz.	Synonym		WCSP
Betula ermanii var. parvifolia Koidz.	Synonym		WCSP
Betula ermanii var. subcordata (Regel) Koidz.	Synonym		WCSP
Betula ermanii var. tomentosa Regel	Synonym		WCSP
Betula ermanii var. yingkiliensis S.L.Liou & Wang	Synonym		WCSP
Betula ethmensis Raf. ex Regel	Unresolved		TRO
Betula etnensis Raf.	Synonym		WCSP
Betula evenkiensis Polozhij	Synonym		WCSP
Betula exalata S. Moore	Synonym		TRO
Betula exaltata S.Moore	Synonym		WCSP
Betula excelsa Pursh [Illegitimate]	Synonym		WCSP
Betula excelsa Aiton	Synonym		WCSP
Betula excelsa Hook. [Illegitimate]	Synonym		WCSP
Betula excelsa var. canadensis Wangenh.	Synonym		WCSP
Betula exilis Sukaczev	Synonym		WCSP
Betula extremio	Unresolved		TRO
Betula extremiorientalis Kuzen. & V.N.Vassil.	Synonym		WCSP
Betula falcata V.N.Vassil.	Accepted		WCSP
Betula fargesii Franch.	Synonym		WCSP
Betula fauriei H.Lév. ex Nakai [Invalid]	Synonym		WCSP
Betula fedtschenkoana V.N.Vassil.	Synonym		WCSP
Betula × fennica Dörfl.	Synonym		WCSP
Betula ferganensis V.N.Vassil.	Accepted		WCSP
Betula finituma Notø [Unplaced]	Unresolved		WCSP
Betula fontinalis Sarg.	Synonym		WCSP
Betula fontinalis var. inopina (Jeps.) Jeps.	Synonym		WCSP
Betula fontinalis f. inopina Jeps.	Synonym		WCSP
Betula fontinalis var. piperi (Britton) Sarg.	Synonym		WCSP
Betula fontinalis var. utahensis (Britton) Garrett	Synonym		WCSP
Betula fontqueri Rothm.	Synonym		WCSP
Betula fontqueri subsp. parvibracteata (Peinado, G.Moreno & A.Velasco) Rivas Mart. & Ladero	Synonym		WCSP
Betula forrestii Hand.-Mazz.	Accepted		WCSP
Betula forrestii var. calcicola (W.W.Sm.) Hand.-Mazz.	Synonym		WCSP
Betula friesii Larss. ex Hartm.	Synonym		WCSP
Betula fruticans Pall. [Invalid]	Synonym		WCSP
Betula fruticosa Willd. [Illegitimate]	Synonym		WCSP
Betula fruticosa Pall.	Accepted		WCSP
Betula fruticosa var. cuneifolia Regel	Synonym		WCSP
Betula fruticosa subsp. extremiorientalis (Kuzen. & V.N.Vassil.) Vorosch.	Synonym		WCSP
Betula fruticosa subsp. fusca (Pall.) M.Schemberg	Synonym		WCSP
Betula fruticosa var. fusenensis (Nakai) Liou	Synonym		WCSP
Betula fruticosa subsp. gmelinii (Bunge) Kitag.	Synonym		WCSP
Betula fruticosa var. gmelinii (Bunge) Regel	Synonym		WCSP
Betula fruticosa var. macrostachys S.L.Tung	Synonym		WCSP
Betula fruticosa var. ovalifolia (Rupr.) S.L.Tung	Synonym		WCSP
Betula fruticosa var. paishanensis (Nakai) S.L.Tung	Synonym		WCSP
Betula fruticosa var. ruprechtiana Trautv.	Synonym		WCSP
Betula fruticosa subsp. ruprechtiana (Trautv.) Kitag.	Synonym		WCSP
Betula fujianensis J.Zeng, Jian H.Li & Z.D.Chen	Accepted		WCSP
Betula fusca Pall. ex Georgi	Synonym		WCSP
Betula fusenensis Nakai	Synonym		WCSP
Betula ganjuensis Koidz.	Synonym		WCSP
Betula glabra Dumort.	Synonym		WCSP
Betula glabrata Wahlenb.	Unresolved		TRO
Betula glaebosa Notø [Unplaced]	Unresolved		WCSP
Betula glandulifera (Regel) E.J.Butler	Synonym		WCSP
Betula × glandulosa Berl. [Unplaced]	Unresolved		WCSP
Betula glandulosa Michx.	Accepted		WCSP
Betula glandulosa var. eucycla Lepage	Synonym		WCSP
Betula glandulosa var. flabellifolia Rosenv.	Synonym		WCSP
Betula glandulosa var. glandulifera (Regel) Gleason	Synonym		WCSP
Betula glandulosa var. hallii (Howell) C.L.Hitchc.	Synonym		WCSP
Betula glandulosa f. intermedia Kurtz	Synonym		WCSP
Betula glandulosa var. pumila Alph.Wood	Synonym		WCSP
Betula glandulosa var. rhomboidea Rosenv.	Synonym		WCSP
Betula glandulosa var. rotundifolia (Spach) Regel	Synonym		WCSP
Betula glandulosa var. sibirica (Ledeb.) C.K.Schneid.	Synonym		WCSP
Betula glandulosa var. sibirica (Ledeb.) S.F. Blake	Synonym		TRO
Betula glauca Wender.	Synonym		WCSP
Betula globispica Shirai	Accepted		WCSP
Betula glutinosa Wallr. [Illegitimate]	Synonym		WCSP
Betula glutinosa (L.) Lam.	Synonym		WCSP
Betula gmelinii Bunge	Synonym		WCSP
Betula gmelinii var. zyzyphifolia (C.Wang & S.L.Tung) G.H.Liu & E.W.Ma	Synonym		WCSP
Betula golitsinii V.N.Vassil.	Synonym		WCSP
Betula gordiagini P.A.Baranov	Synonym		WCSP
Betula grandifolia Litv. [Illegitimate]	Synonym		WCSP
Betula grandifolia var. pubescens Kuzen.	Synonym		WCSP
Betula grandis Schrad.	Synonym		WCSP
Betula grayi Regel	Synonym		WCSP
Betula grossa Siebold & Zucc.	Accepted		WCSP
Betula × grossii Natho [Unplaced]	Unresolved		WCSP
Betula gummifera Bertol.	Synonym		WCSP
Betula guthriei Sudw. [Unplaced]	Unresolved		WCSP
Betula gynoterminalis Y.C.Hsu & C.J.Wang	Synonym		WCSP
Betula hackelii Opiz ex Steud.	Synonym		WCSP
Betula hallii Howell	Synonym		WCSP
Betula halophila Ching	Accepted		WCSP
Betula × harcynica Wender.	Unresolved		WCSP
Betula henriettae Sukaczev & V.N.Vassil.	Synonym		WCSP
Betula heptopotamica V.N.Vassil.	Accepted		WCSP
Betula hippolyti Sukaczev	Synonym		WCSP
Betula hissarica V.N.Vassil.	Synonym		WCSP
Betula honanensis S.Y.Wang & C.L.Chang	Accepted		WCSP
Betula × hornei E.J.Butler	Accepted		WCSP
Betula humilis Marshall [Invalid]	Synonym		WCSP
Betula × humilis Fr. ex Regel [Invalid]	Unresolved		WCSP
Betula humilis Schrank	Accepted		WCSP
Betula humilis f. calcarata Perfil.	Synonym		WCSP
Betula humilis var. camtschatica Regel	Synonym		WCSP
Betula humilis var. commutata Regel	Synonym		WCSP
Betula humilis f. crispa Perfil.	Synonym		WCSP
Betula humilis var. cuneata Perfil.	Synonym		WCSP
Betula humilis var. kamtschatica Regel	Synonym		WCSP
Betula humilis f. obovata Perfil.	Synonym		WCSP
Betula humilis var. ovalifolia (Rupr.) Regel	Synonym		WCSP
Betula humilis var. oycowiensis Nyman	Synonym		WCSP
Betula humilis var. palustris J.F.Gmel.	Synonym		WCSP
Betula humilis var. reticulata (Rupr.) Regel	Synonym		WCSP
Betula humilis var. socolowii Regel	Synonym		WCSP
Betula humilis var. subcordata Perfil.	Synonym		WCSP
Betula humilis var. tatewakiana (M.Ohki & S.Watan.) Murata	Synonym		WCSP
Betula hupehensis C.K.Schneid.	Synonym		WCSP
Betula hybrida Blom	Synonym		WCSP
Betula × hybrida Bechst. [Illegitimate]	Unresolved		WCSP
Betula incana (L.) L.f.	Synonym		WCSP
Betula incana var. angulata Aiton	Synonym		WCSP
Betula incana var. glauca Aiton	Synonym		WCSP
Betula incana var. minor Tourr.	Synonym		WCSP
Betula incisa (Koidz.) Koidz.	Synonym		WCSP
Betula insignis Franch.	Accepted		WCSP
Betula insularis V.N.Vassil.	Synonym		WCSP
Betula × intermedia Thomas ex Rchb.	Unresolved		WCSP
Betula ircutensis Sukaczev	Synonym		WCSP
Betula itelmenorum V.N.Vassil.	Synonym		WCSP
Betula × jackii C.K.Schneid.	Accepted		WCSP
Betula jacquemontii Spach	Synonym		WCSP
Betula jacquemontii subsp. occidentalis (Kitam.) Browicz	Synonym		WCSP
Betula jacutica V.N.Vassil.	Synonym		WCSP
Betula japonica Thunb.	Synonym		WCSP
Betula japonica (Miq.) Siebold ex H.J.W.Winkl. [Illegitimate]	Synonym		WCSP
Betula japonica var. camtschatica (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula japonica var. mandshurica (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula japonica var. pluricostata H.J.P.Winkl.	Synonym		WCSP
Betula japonica var. resinifera (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula japonica var. rockii Rehder	Synonym		WCSP
Betula japonica var. sachalinensis Koidz.	Synonym		WCSP
Betula japonica var. szechuanica C.K.Schneid.	Synonym		WCSP
Betula japonica var. tauschii (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula jarmolenkoana Golosk.	Accepted		WCSP
Betula jiaodongensis S.B.Liang	Accepted		WCSP
Betula jinpingensis P.C. Li	Accepted		TRO
Betula jiulungensis P.C.Li ex Q.Lin	Accepted		WCSP
Betula kamtschatica H.Buek	Synonym		WCSP
Betula kamtschatica (Regel) C.-A.Jansson [Illegitimate]	Synonym		WCSP
Betula kamtschatica var. kenaica (W.H.Evans) C.-A.Jansson	Synonym		WCSP
Betula karagandensis V.N.Vassil.	Accepted		WCSP
Betula × kateninii Tzvelev	Synonym		WCSP
Betula kelleriana Sukaczev	Synonym		WCSP
Betula kenaica W.H.Evans	Accepted		WCSP
Betula kenaica var. japonica (Miq.) Lindq.	Synonym		WCSP
Betula kirghisorum Sawicz	Accepted		WCSP
Betula klokovii Zaver.	Accepted		WCSP
Betula × koehnei C.K.Schneid. [Unplaced]	Unresolved		WCSP
Betula komarovii Perfil. & Kolesn.	Synonym		WCSP
Betula korshinskyi Litv.	Accepted		WCSP
Betula kossogolica V.N.Vassil.	Synonym		WCSP
Betula kotulae Zaver.	Accepted		WCSP
Betula krylovii G.V.Krylov	Synonym		WCSP
Betula kunarensis Browicz	Accepted		WCSP
Betula × kusmisscheffii (Regel) Sukaczev	Unresolved		WCSP
Betula kwangsiensis F.P.Metcalf	Synonym		WCSP
Betula kweichowensis Hu	Synonym		WCSP
Betula laciniata Ehrh. [Illegitimate]	Synonym		WCSP
Betula laciniata Thunb. [Illegitimate]	Synonym		WCSP
Betula laciniata Blom	Synonym		WCSP
Betula laciniata Wahlenb. [Illegitimate]	Synonym		WCSP
Betula laciniata var. crispa Rchb.	Synonym		WCSP
Betula × lagopina Hartm. ex Regel	Unresolved		WCSP
Betula lanata (Regel) V.N.Vassil.	Accepted		WCSP
Betula lanulosa Michx.	Synonym		WCSP
Betula latifolia Andrz. [Unplaced]	Unresolved		WCSP
Betula latifolia Tausch	Synonym		WCSP
Betula latifolia Kom.	Synonym		TRO
Betula latifolia var. cuneifolia Nakai	Synonym		WCSP
Betula latifolia var. kamtschatica (Regel) Makino & Nemoto	Synonym		WCSP
Betula latifolia var. mandshurica (Regel) Nakai	Synonym		WCSP
Betula latifolia var. pluricostata (H.J.P.Winkl.) Makino & Nemoto	Synonym		WCSP
Betula lenta Du Roi	Synonym		WCSP
Betula lenta L.	Accepted		WCSP
Betula lenta var. carpinifolia Regel	Synonym		WCSP
Betula lenta var. grossa (Siebold & Zucc.) Regel	Synonym		WCSP
Betula lenta var. humilis (Marshall) Castigl.	Synonym		WCSP
Betula lenta f. laciniata Rehder	Synonym		WCSP
Betula lenta subsp. lenta	Accepted		WCSP
Betula lenta var. lutea Regel	Synonym		WCSP
Betula lenta var. papyrifera (Marshall) Castigl.	Synonym		WCSP
Betula lenta var. persicifolia Dippel	Synonym		WCSP
Betula lenta var. populifolia (Marshall) Castigl.	Synonym		WCSP
Betula lenta var. uber Ashe	Synonym		WCSP
Betula lenta subsp. uber (Ashe) A.E.Murray	Accepted		WCSP
Betula lenta f. uber (Ashe) McAll. & Ashburner	Synonym		WCSP
Betula leptophylla Regel	Synonym		WCSP
Betula leptostachya Wall. [Invalid]	Synonym		WCSP
Betula liaotungensis A.I.Baranov	Synonym		WCSP
Betula lipskyi V.N.Vassil.	Synonym		WCSP
Betula littelliana Tucker	Synonym		WCSP
Betula litwinowii Doluch.	Accepted		WCSP
Betula litwinowii var. recurvata I.V.Vassil.	Synonym		WCSP
Betula lobulata Kit.	Synonym		WCSP
Betula longifolia Bové ex Spach	Synonym		WCSP
Betula longilobata Sipliv.	Synonym		WCSP
Betula lucida Courtois	Synonym		WCSP
Betula ludmilae V.N.Vassil.	Synonym		WCSP
Betula luminifera H.J.P.Winkl.	Accepted		WCSP
Betula luminifera var. baeumkeri (H.J.P.Winkl.) P.C.Kuo	Synonym		WCSP
Betula luminifera f. pachystachya X.M.Liu	Synonym		WCSP
Betula lutea F.Michx. [Illegitimate]	Synonym		WCSP
Betula lutea var. alleghaniensis (Britton) Rehder	Synonym		WCSP
Betula lutea f. fallax Fassett	Synonym		WCSP
Betula lutea f. macrolepis (Fernald) Fernald	Synonym		WCSP
Betula lutea var. macrolepis Fernald	Synonym		WCSP
Betula lutea var. persicifolia Dippel	Synonym		WCSP
Betula lyalliana (Koehne) Bean	Synonym		WCSP
Betula maackii Rupr.	Synonym		WCSP
Betula maarensis V.N.Vassil. & Husseinova	Synonym		WCSP
Betula macrostachya Schrad. ex Regel	Synonym		WCSP
Betula major Gilib. [Invalid]	Synonym		WCSP
Betula mandshurica (Regel) Nakai	Synonym		WCSP
Betula mandshurica var. japonica (Miq.) Rehder	Synonym		WCSP
Betula mandshurica var. kamtschatica (Regel) Rehder	Synonym		WCSP
Betula mandshurica var. rockii (Rehder) Rehder	Synonym		WCSP
Betula mandshurica var. szechuanica (C.K.Schneid.) Rehder	Synonym		WCSP
Betula margusarica V.N.Vassil.	Accepted		WCSP
Betula maximowicziana Regel	Accepted		WCSP
Betula maximowiczii Regel [Illegitimate]	Synonym		WCSP
Betula maximowiczii Rupr.	Synonym		WCSP
Betula media Laest.	Unresolved		TRO
Betula medwedieaii Regel	Unresolved		TRO
Betula medwediewii Regel	Accepted		WCSP
Betula megalocarpa Laest.	Unresolved		TRO
Betula megaloptera Kindb. [Unplaced]	Unresolved		WCSP
Betula megrelica Sosn.	Accepted		WCSP
Betula michauxii Spach	Accepted		WCSP
Betula microdontia Kindb. [Unplaced]	Unresolved		WCSP
Betula microlepis I.V.Vassil.	Synonym		WCSP
Betula microlepis var. moldavica Osadchii	Synonym		WCSP
Betula microphylla Bunge	Accepted		WCSP
Betula microphylla var. fontinalis (Sarg.) M.E.Jones	Synonym		WCSP
Betula microphylla var. occidentalis (Hook.) M.E.Jones	Synonym		WCSP
Betula microphylla var. rezniczenkoana Litv.	Synonym		WCSP
Betula microphylla var. utahensis (Britton) M.E.Jones	Synonym		WCSP
Betula middendorffii Trautv. & C.A.Mey.	Synonym		WCSP
Betula middendorffii var. communis Trautv. ex Regel	Synonym		WCSP
Betula middendorffii var. globosa Regel	Synonym		WCSP
Betula middendorffii var. nitida Regel	Synonym		WCSP
Betula minor (Tuck.) Fernald	Accepted		WCSP
Betula minor Auth.	Synonym		TRO
Betula miyoshii Nakai [Invalid]	Synonym		WCSP
Betula mongolica V.N.Vassil.	Synonym		WCSP
Betula montana V.N.Vassil.	Synonym		WCSP
Betula montanensis Rydb. ex B.T.Butler	Synonym		WCSP
Betula murgabica V.N.Vassil.	Accepted		WCSP
Betula murithii Gaudin ex Regel	Synonym		WCSP
Betula × murrayana B.V.Barnes & Dancik	Accepted		WCSP
Betula myrsinoides Tausch	Synonym		WCSP
Betula nakaiana Tatew. & Hurus. [Unplaced]	Unresolved		WCSP
Betula nana L.	Accepted		WCSP
Betula nana var. alpestris (Fr.) Regel	Synonym		WCSP
Betula nana var. borealis Regel	Synonym		WCSP
Betula nana var. europaea Ledeb.	Synonym		WCSP
Betula nana subsp. exilis (Sukaczev) Hultén	Accepted		WCSP
Betula nana var. flabellifolia Hook.	Synonym		WCSP
Betula nana var. glandulifera (Regel) B.Boivin	Synonym		WCSP
Betula nana var. intermedia Hartm.	Unresolved		WCSP
Betula nana var. intermedia Regel [Illegitimate]	Synonym		WCSP
Betula nana f. magnifolia Hartz	Synonym		WCSP
Betula nana var. michauxii (Spach) Regel	Synonym		WCSP
Betula nana subsp. nana	Accepted		WCSP
Betula nana subsp. perfiljevii (V.N.Vassil.) Á.Löve & D.Löve	Synonym		WCSP
Betula nana var. reducta Hultén	Synonym		WCSP
Betula nana f. reducta (Hultén) B.Boivin	Synonym		WCSP
Betula nana var. relicta Th.Fr. ex Gürke	Synonym		WCSP
Betula nana subsp. relicta (Th.Fr. ex Gürke) Nyman	Synonym		WCSP
Betula nana var. renifolia (Fernald) B.Boivin	Synonym		WCSP
Betula nana subsp. rotundifolia (Spach) Malyschev	Accepted		WCSP
Betula nana var. sibirica Ledeb.	Synonym		WCSP
Betula nana subsp. tundrarum (Perfil.) Á.Löve & D.Löve	Synonym		WCSP
Betula naniformis Lindb. ex Kindb.	Synonym		WCSP
Betula neoalaskana Sarg.	Accepted		WCSP
Betula neoalaskana var. kenaica (W.H.Evans) B.Boivin	Synonym		WCSP
Betula neoborealis Lepage	Synonym		WCSP
Betula nigra L.	Accepted		WCSP
Betula nigra var. parvifolia Regel	Synonym		WCSP
Betula nigricans Wender.	Synonym		WCSP
Betula niijimae Nakai [Invalid]	Synonym		WCSP
Betula nikoensis Koidz.	Synonym		WCSP
Betula nitida D.Don	Synonym		WCSP
Betula nitida var. affinis (Spach) Regel	Synonym		WCSP
Betula oblongata Aiton	Synonym		WCSP
Betula obovata E.J.Butler	Synonym		WCSP
Betula × obscura Kotula ex Fiek	Synonym		WCSP
Betula obscura Kotula	Accepted		TRO
Betula occidentalis Hook.	Accepted		WCSP
Betula occidentalis var. fecunda Fernald	Synonym		WCSP
Betula occidentalis subsp. fecunda (Fernald) A.E.Murray	Synonym		WCSP
Betula occidentalis f. inopina Jeps.	Synonym		WCSP
Betula occidentalis subsp. inopina (Jeps.) A.E.Murray	Synonym		WCSP
Betula occidentalis var. inopina (Jeps.) C.L.Hitchc.	Synonym		WCSP
Betula odorata Bechst.	Synonym		WCSP
Betula odorata var. alpestris (Fr.) Rosenv.	Synonym		WCSP
Betula odorata var. alpigena Blytt	Synonym		WCSP
Betula odorata var. tortuosa (Ledeb.) Rosenv.	Synonym		WCSP
Betula ovalifolia Rupr.	Accepted		WCSP
Betula ovata K.Koch	Synonym		WCSP
Betula ovata Schrank	Synonym		WCSP
Betula ovczinnikovii V.N.Vassil.	Accepted		WCSP
Betula oxytzowiensis Dippel	Unresolved		TRO
Betula oycoviensis Besser	Accepted		TRO
Betula oycowiensis Besser	Synonym		WCSP
Betula oycowiensis Rchb. [Illegitimate]	Synonym		WCSP
Betula paishanensis Nakai	Synonym		WCSP
Betula palmata Borkh.	Synonym		WCSP
Betula palmata var. bircalensis (Mela) Tzvelev	Synonym		WCSP
Betula palmata var. crispa (Rchb.) Tzvelev	Synonym		WCSP
Betula palmata var. lobulata (C.Andersson) Tzvelev	Synonym		WCSP
Betula palmiformis Laest.	Unresolved		TRO
Betula palustris Salisb. [Illegitimate]	Synonym		WCSP
Betula palustris Rupr. [Illegitimate]	Synonym		WCSP
Betula pamirica Litv.	Accepted		WCSP
Betula papyracea Aiton	Synonym		WCSP
Betula papyracea var. communis (Regel) Schelle	Synonym		WCSP
Betula papyracea var. cordifolia (Regel) Dippel	Synonym		WCSP
Betula papyracea var. cordifolia (Regel) Schelle	Synonym		TRO
Betula papyracea var. grandis (Schrad.) Schelle	Synonym		WCSP
Betula papyracea var. lyalliana (Koehne) Schelle	Synonym		WCSP
Betula papyracea var. minor Tuck.	Synonym		WCSP
Betula papyracea var. occidentalis (Hook.) Dippel	Synonym		WCSP
Betula papyrifera Marshall	Accepted		WCSP
Betula papyrifera var. andrewsii Daniels	Synonym		WCSP
Betula papyrifera var. communis Regel	Synonym		WCSP
Betula papyrifera var. commutata (Regel) Fernald	Synonym		WCSP
Betula papyrifera subsp. commutata (Regel) A.E.Murray	Synonym		WCSP
Betula papyrifera var. cordifolia (Regel) Regel	Accepted		WCSP
Betula papyrifera subsp. cordifolia (Regel) A.E.Murray	Synonym		WCSP
Betula papyrifera f. cordifolia (Regel) C.K.Schneid.	Synonym		WCSP
Betula papyrifera var. cordifolia (Regel) Fernald	Synonym		TRO
Betula papyrifera f. coriacea Fernald & Wiegand	Synonym		WCSP
Betula papyrifera var. elobata (Fernald) Sarg.	Synonym		WCSP
Betula papyrifera f. elobata (Fernald) B.Boivin	Synonym		WCSP
Betula papyrifera var. humilis (Regel) Fernald & Raup	Synonym		WCSP
Betula papyrifera subsp. humilis (Regel) A.E.Murray	Synonym		WCSP
Betula papyrifera subsp. humilis (Regel) Hultén	Synonym		TRO
Betula papyrifera var. kenaica (W.H.Evans) A.Henry	Synonym		WCSP
Betula papyrifera subsp. kenaica (W.H.Evans) A.E.Murray	Synonym		WCSP
Betula papyrifera f. longipes Fernald	Synonym		WCSP
Betula papyrifera var. lyalliana Koehne	Synonym		WCSP
Betula papyrifera var. macrostachya Fernald	Synonym		WCSP
Betula papyrifera var. minor Tuck.	Synonym		TRO
Betula papyrifera var. montanensis (Rydb. ex B.T.Butler) Sarg.	Synonym		WCSP
Betula papyrifera f. nana B.Boivin	Synonym		WCSP
Betula papyrifera var. neoalaskana (Sarg.) Raup	Synonym		WCSP
Betula papyrifera subsp. neoalaskana (Sarg.) A.E.Murray	Synonym		WCSP
Betula papyrifera subsp. occidentalis (Hook.) Hultén	Synonym		WCSP
Betula papyrifera var. occidentalis (Hook.) Sarg.	Synonym		WCSP
Betula papyrifera var. papyrifera	Accepted		WCSP
Betula papyrifera var. pensilis Fernald	Synonym		WCSP
Betula papyrifera var. recessa Lepage	Synonym		WCSP
Betula papyrifera var. subcordata (Rydb. ex B.T.Butler) Sarg.	Synonym		WCSP
Betula papyrifera subsp. subcordata (Rydb. ex B.T.Butler) A.E.Murray	Synonym		WCSP
Betula paraermanii V.N.Vassil.	Synonym		WCSP
Betula paramushirensis Barkalov	Accepted		WCSP
Betula parvibracteata Peinado, G.Moreno & A.Velasco	Synonym		WCSP
Betula pavlovii P.A.Baranov	Synonym		WCSP
Betula pendula Roth	Accepted		WCSP
Betula pendula f. bircalensis (Mela) Hämet-Ahti	Synonym		WCSP
Betula pendula var. carelica (Merckl.) Hämet-Ahti	Synonym		WCSP
Betula pendula f. crispa (Rchb.) Hämet-Ahti	Synonym		WCSP
Betula pendula f. dalecarlica (L.f.) C.K.Schneid.	Synonym		WCSP
Betula pendula subsp. etnensis (Raf.) Zangh.	Synonym		WCSP
Betula pendula f. fastigiata (Clemenc.) Dippel	Synonym		WCSP
Betula pendula subsp. fontqueri (Rothm.) G.Moreno & Peinado	Synonym		WCSP
Betula pendula var. fontqueri (Rothm.) G.Moreno & Peinado	Accepted		WCSP
Betula pendula var. japonica (Miq.) Rehder	Synonym		WCSP
Betula pendula subsp. kamtschatica (Regel) Shemberg	Synonym		WCSP
Betula pendula var. laciniata Tidestr.	Synonym		WCSP
Betula pendula var. lapponica (Lindq.) Hämet-Ahti	Synonym		WCSP
Betula pendula var. meridionalis G.Moreno & Peinado	Synonym		WCSP
Betula pendula f. microdonta C.K.Schneid.	Synonym		WCSP
Betula pendula var. microlepis (I.V.Vassil.) Doluch.	Synonym		WCSP
Betula pendula var. obscura (Kotula ex Fiek) Olšavská	Synonym		WCSP
Betula pendula var. oycowiensis (Besser) Dippel	Accepted		WCSP
Betula pendula f. palmeri Hämet-Ahti	Synonym		WCSP
Betula pendula var. parvibracteata (Peinado, G.Moreno & A.Velasco) G.Moreno & Peinado	Synonym		WCSP
Betula pendula var. pendula	Accepted		WCSP
Betula pendula var. tauschii (Regel) Rehder	Synonym		WCSP
Betula perfiljevii V.N.Vassil.	Synonym		WCSP
Betula persicifolia K.Koch [Invalid]	Synonym		WCSP
Betula pinnata Lundmark	Synonym		WCSP
Betula pinnata var. hybrida Lundmark	Synonym		WCSP
Betula × piperi Britton	Synonym		WCSP
Betula pirifolia K.Koch	Synonym		WCSP
Betula platyodontia Kindb. [Unplaced]	Unresolved		WCSP
Betula platyphylla Sukaczev	Accepted		WCSP
Betula platyphylla var. brunnea J.X.Huang	Synonym		WCSP
Betula platyphylla var. cuneifolia (Nakai) H.Hara	Synonym		WCSP
Betula platyphylla var. japonica (Miq.) H.Hara	Synonym		WCSP
Betula platyphylla var. japonica (Miq.) Hara	Synonym		TRO
Betula platyphylla subsp. kamtschatica (Regel) Vorosch.	Accepted		WCSP
Betula platyphylla var. kamtschatica (Regel) H.Hara	Synonym		WCSP
Betula platyphylla var. kamtschatica (Regel) HARA	Synonym		TRO
Betula platyphylla f. laciniata (Miyabe & Tatew.) H.Hara	Synonym		WCSP
Betula platyphylla var. mandshurica (Regel) H.Hara	Synonym		WCSP
Betula platyphylla subsp. mandshurica (Regel) Kitag.	Accepted		WCSP
Betula platyphylla subsp. minutifolia (Kozhevn.) Kozhevn.	Accepted		WCSP
Betula platyphylla var. phellodendroides S.L.Tung	Synonym		WCSP
Betula platyphylla subsp. platyphylla	Accepted		WCSP
Betula platyphylla var. pluricostata (H.J.P.Winkl.) Tatew.	Synonym		WCSP
Betula platyphylla var. rockii (Rehder) Rehder	Synonym		WCSP
Betula platyphylla var. szechuanica (C.K.Schneid.) Rehder	Synonym		WCSP
Betula platyphylla var. tauschii (Regel) Tatew.	Synonym		WCSP
Betula platyphylloides V.N.Vassil.	Synonym		WCSP
Betula platyphylloides var. microphylla Osadchii	Synonym		WCSP
Betula platyptera Kindb.	Unresolved		TRO
Betula plettkei Junge [Unplaced]	Unresolved		WCSP
Betula pontica Loudon	Synonym		WCSP
Betula populifolia Aiton	Synonym		WCSP
Betula populifolia Marshall	Accepted		WCSP
Betula populifolia f. incisifolia Fernald	Synonym		WCSP
Betula populifolia var. pendula Loudon	Synonym		WCSP
Betula populifolia f. pendula (Loudon) H.J.P.Winkl.	Synonym		WCSP
Betula potamophila V.N.Vassil.	Accepted		WCSP
Betula potaninii Batalin	Accepted		WCSP
Betula potaninii var. trichogemma L.C.Hu	Synonym		WCSP
Betula prochorowii Kuzen. & Litv.	Synonym		WCSP
Betula procurva Litv.	Accepted		WCSP
Betula procurva subsp. lipskyi (V.N.Vassil.) Ovcz.	Accepted		WCSP
Betula procurva subsp. schugnanica (B.Fedtsch.) Ovcz.	Accepted		WCSP
Betula psammophila V.N.Vassil.	Accepted		WCSP
Betula pseudoalafica V.N. Vassil.	Synonym		TRO
Betula pseudoalajica V.N.Vassil.	Synonym		WCSP
Betula × pseudocarpatica Simonk. [Unplaced]	Unresolved		WCSP
Betula pseudolenta V.N.Vassil.	Synonym		WCSP
Betula pseudomiddendorffii V.N.Vassil.	Synonym		WCSP
Betula pseudopendula V.N.Vassil.	Synonym		WCSP
Betula pubentissima V.N.Vassil. [Unplaced]	Unresolved		WCSP
Betula pubescens Ehrh.	Accepted		WCSP
Betula pubescens var. appressa Kallio & Y.Mäkinen	Synonym		WCSP
Betula pubescens subsp. borealis (Spach) Á.Löve & D.Löve	Synonym		WCSP
Betula pubescens var. borealis (Spach) Á. Löve & D. Löve	Synonym		TRO
Betula pubescens subsp. callosa (Notø) Á.Löve & D.Löve	Synonym		WCSP
Betula pubescens subsp. carpatica (Waldst. & Kit. ex Willd.) Asch. & Graebn.	Synonym		WCSP
Betula pubescens var. carpatica (Waldst. & Kit. ex Willd.) W.D.J.Koch	Synonym		WCSP
Betula pubescens subsp. celtiberica (Rothm. & Vasc.) Rivas Mart.	Synonym		WCSP
Betula pubescens f. columnaris T.Ulvinen	Synonym		WCSP
Betula pubescens subsp. concinna (Gunnarsson) Á.Löve & D.Löve	Synonym		WCSP
Betula pubescens var. cryptocarpa Laest.	Synonym		WCSP
Betula pubescens var. czerepanovii (N.I.Orlova) Hämet-Ahti	Synonym		WCSP
Betula pubescens subsp. czerepanovii (N.I.Orlova) Hämet-Ahti	Synonym		WCSP
Betula pubescens var. denudata Gren. & Godr.	Synonym		WCSP
Betula pubescens var. friesii (Larss. ex Hartm.) Nyman	Synonym		WCSP
Betula pubescens var. glabra Fiek ex C.K.Schneid.	Synonym		WCSP
Betula pubescens var. glabrata Wahlenb.	Accepted		WCSP
Betula pubescens subsp. glutinosa (Trautv. ex Regel) Berher	Synonym		WCSP
Betula pubescens var. glutinosa (Trautv. ex Regel) Nyman	Synonym		WCSP
Betula pubescens var. golitsinii (V.N.Vassil.) Tzvelev	Accepted		WCSP
Betula pubescens f. hibernifolia T.Ulvinen	Synonym		WCSP
Betula pubescens var. lucida (Courtois) Wesm.	Synonym		WCSP
Betula pubescens var. media Laest.	Synonym		WCSP
Betula pubescens var. megalocarpa Laest.	Synonym		WCSP
Betula pubescens subsp. minor (Tuck.) Á.Löve & D.Löve	Synonym		WCSP
Betula pubescens var. murithii (Gaudin ex Regel) Gremli	Synonym		WCSP
Betula pubescens subsp. murithii (Gaudin ex Regel) Nyman	Synonym		WCSP
Betula pubescens subsp. nigricans Maire ex Just	Synonym		WCSP
Betula pubescens var. nigricans (Wender.) Nyman	Synonym		WCSP
Betula pubescens var. oblongifolia Wimm.	Synonym		WCSP
Betula pubescens subsp. odorata (Bechst.) E.F.Warb.	Synonym		WCSP
Betula pubescens subsp. odorata (Bechst.) Warb.	Synonym		TRO
Betula pubescens var. ovalifolia Sukaczev	Synonym		WCSP
Betula pubescens subsp. ovalifolia (Sukaczev) Printz	Synonym		WCSP
Betula pubescens var. palmiformis Laest.	Synonym		WCSP
Betula pubescens f. pendula Schelle	Synonym		WCSP
Betula pubescens var. pubescens	Accepted		WCSP
Betula pubescens var. pumila (L.) Govaerts	Accepted		WCSP
Betula pubescens var. rhombifolia (Tausch) Sukaczev	Synonym		WCSP
Betula pubescens subsp. rhombifolia (Tausch) Printz	Synonym		WCSP
Betula pubescens f. rubra T.Ulvinen	Synonym		WCSP
Betula pubescens var. rustica Laest.	Synonym		WCSP
Betula pubescens var. sibakademica Baran.	Synonym		WCSP
Betula pubescens var. silvatica Laest.	Synonym		WCSP
Betula pubescens var. silvestris Laest.	Synonym		WCSP
Betula pubescens var. songarica Regel	Synonym		WCSP
Betula pubescens var. subaequalis Laest.	Synonym		WCSP
Betula pubescens var. subalpina Laest.	Synonym		WCSP
Betula pubescens subsp. subarctica (Orlova) Á.Löve & D.Löve	Synonym		WCSP
Betula pubescens subsp. suecica Gunnarsson	Synonym		WCSP
Betula pubescens var. tiliifolia Laest.	Synonym		WCSP
Betula pubescens subsp. tortuosa (Ledeb.) Nyman	Synonym		WCSP
Betula pubescens var. tortuosa (Ledeb.) Koehne	Synonym		WCSP
Betula pubescens var. vestita Gren. & Godr.	Synonym		WCSP
Betula pulchella Dippel [Unplaced]	Unresolved		WCSP
Betula pumila L.	Accepted		WCSP
Betula pumila var. borealis (Spach) Regel	Synonym		WCSP
Betula pumila var. fastigiata Rehder	Synonym		WCSP
Betula pumila var. glabra Regel	Synonym		WCSP
Betula pumila var. glabrescens Regel	Synonym		WCSP
Betula pumila f. glabrescens (Regel) Regel	Synonym		WCSP
Betula pumila subsp. glandulifera (Regel) Á.Löve & D.Löve	Synonym		WCSP
Betula pumila var. glandulifera Regel	Synonym		WCSP
Betula pumila f. glandulifera (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula pumila f. hallii (Howell) Brayshaw	Synonym		WCSP
Betula pumila f. latipes (H.J.P.Winkl.) Lepage	Synonym		WCSP
Betula pumila var. latipes H.J.P.Winkl.	Synonym		WCSP
Betula pumila f. pubescens H.J.P.Winkl.	Synonym		WCSP
Betula pumila var. renifolia Fernald	Synonym		WCSP
Betula pumila var. setarioides H.J.P.Winkl.	Synonym		WCSP
Betula pumila f. subcycla Lepage	Synonym		WCSP
Betula × purpusii C.K.Schneid.	Accepted		WCSP
Betula pyrolifolia V.N.Vassil.	Accepted		WCSP
Betula quebeccensis Burgsd.	Synonym		WCSP
Betula raddeana Trautv.	Accepted		WCSP
Betula × raymundii Lepage	Accepted		WCSP
Betula recurvata (I.V.Vassil.) V.N.Vassil.	Synonym		WCSP
Betula regeliana V.N.Vassil.	Accepted		WCSP
Betula resinifera Royle [Unplaced]	Unresolved		WCSP
Betula resinifera Britton [Illegitimate]	Synonym		WCSP
Betula reticulata Rupr.	Synonym		WCSP
Betula rezniczenkoana (Litv.) Schischk.	Synonym		WCSP
Betula rhombibracteata P.C.Li	Synonym		WCSP
Betula × rhombifolia Tausch	Synonym		WCSP
Betula rhombifolia Nutt. [Unplaced]	Unresolved		WCSP
Betula riparia W.W.Sm.	Synonym		WCSP
Betula rockii (Rehder) C.-A.Jansson	Accepted		WCSP
Betula rosae H.J.P.Winkl. [Unplaced]	Unresolved		WCSP
Betula × rosendahlii Butters & Abbe [Unplaced]	Unresolved		WCSP
Betula rossica Miniaev [Unplaced]	Unresolved		WCSP
Betula rotundata Beck	Synonym		WCSP
Betula rotundifolia Regel & Tiling [Illegitimate]	Synonym		WCSP
Betula rotundifolia Spach	Synonym		WCSP
Betula rubra Regel [Unplaced]	Unresolved		WCSP
Betula rubra F.Michx.	Synonym		WCSP
Betula rugosa (Du Roi) Ehrh.	Synonym		WCSP
Betula rumnica P.A.Baranov	Synonym		WCSP
Betula ruprechtiana Trautv.	Unresolved		TRO
Betula rustica Laest.	Unresolved		TRO
Betula saitoana Nakai	Synonym		WCSP
Betula sajanensis V.N.Vassil.	Synonym		WCSP
Betula saksarensis Polozhij & A.T.Malzeva	Accepted		WCSP
Betula × sandbergii Britton	Accepted		WCSP
Betula × sandbergii f. maxima Rosend.	Synonym		WCSP
Betula saposhnikovii Sukaczev	Accepted		WCSP
Betula saposhnikovii subsp. jarmolenkoana (Golosk.) Ovcz. & Czukav.	Synonym		WCSP
Betula saposhnikovii subsp. jarmolenkoana (Golosk.) Ovcz. & Czuk.	Synonym		TRO
Betula saposhnikovii subsp. murgabica (V.N.Vassil.) Ovcz. & Czukav.	Synonym		WCSP
Betula saposhnikovii subsp. murgabica (V.N. Vassil.) Ovcz. & Czuk.	Synonym		TRO
Betula × sargentii Dugle	Accepted		WCSP
Betula saviczii V.N.Vassil.	Accepted		WCSP
Betula saxophila Lepage	Synonym		WCSP
Betula schmidtii Regel	Accepted		WCSP
Betula schmidtii var. angustifolia Makino & Nemoto	Synonym		WCSP
Betula schmidtii f. angustifolia (Makino & Nemoto) Sugim. ex H.Ohba	Synonym		WCSP
Betula schugnanica (B.Fedtsch.) Litv.	Synonym		WCSP
Betula × seideliana Missbach	Unresolved		WCSP
Betula seravschanica V.N.Vassil.	Accepted		WCSP
Betula serrulata Aiton	Synonym		WCSP
Betula sessilis Kom.	Synonym		WCSP
Betula setarioides H. Winkl.	Unresolved		TRO
Betula shikokiana Nakai	Synonym		WCSP
Betula sibirica (Ledeb.) C.Pei	Synonym		WCSP
Betula sibirica Lodd. ex Regel	Synonym		WCSP
Betula silvatica Laest.	Unresolved		TRO
Betula silvestris Laest.	Unresolved		TRO
Betula socolowii J.Jacq. ex Regel [Invalid]	Synonym		WCSP
Betula sokolowii Regel	Synonym		WCSP
Betula sollennis Koidz.	Synonym		WCSP
Betula songarica Regel	Unresolved		TRO
Betula stenocarpa Kindb.	Synonym		WCSP
Betula stenolepis V.N.Vassil.	Synonym		WCSP
Betula subalpina Laest.	Unresolved		TRO
Betula subarctica Orlova	Synonym		WCSP
Betula subarctica var. pojarkovae Tzvelev	Synonym		WCSP
Betula subcordata Rydb. ex B.T.Butler	Synonym		WCSP
Betula subodorata Kindb.	Synonym		WCSP
Betula substepposa V.N.Vassil.	Synonym		WCSP
Betula subteicholepidea Kindb.	Unresolved		TRO
Betula × subtricholepidea Kindb.	Unresolved		WCSP
Betula × sukaczevii Soczeva	Unresolved		TRO
Betula × sukatschewii Soczava	Unresolved		WCSP
Betula sunanensis Y.J.Zhang	Accepted		WCSP
Betula szaferi Jent.-Szaf. ex Staszk.	Synonym		WCSP
Betula szechuanica (C.K.Schneid.) C.-A.Jansson	Accepted		WCSP
Betula tadzhikistanica V.N.Vassil.	Accepted		WCSP
Betula talassica Poljakov	Synonym		WCSP
Betula tatewakiana M.Ohki & S.Watan.	Synonym		WCSP
Betula tauschii (Regel) Koidz.	Synonym		WCSP
Betula tauschii var. cuneifolia (Nakai) Nemoto	Synonym		WCSP
Betula tauschii var. kamtschatica (Regel) Koidz.	Synonym		WCSP
Betula tauschii f. laciniata Miyabe & Tatew.	Synonym		WCSP
Betula tauschii var. pluricostata (H.J.P.Winkl.) Koidz.	Synonym		WCSP
Betula terrae-novae Fernald	Synonym		WCSP
Betula tessingolica P.A.Baranov	Synonym		WCSP
Betula tianschanica Rupr.	Accepted		WCSP
Betula tianschanica subsp. margusarica (V.N.Vassil.) Ovcz.	Synonym		WCSP
Betula tilliifolia Laest.	Unresolved		TRO
Betula tiulinae V.N.Vassil.	Synonym		WCSP
Betula tomentosa Reitter & Abeleven	Synonym		WCSP
Betula torfacea Schleich.	Synonym		WCSP
Betula tortuosa Ledeb.	Synonym		WCSP
Betula tortuosa var. pubescens Regel	Synonym		WCSP
Betula transbaicalensis V.N.Vassil.	Synonym		WCSP
Betula transcaucasica V.N.Vassil.	Synonym		WCSP
Betula transsilvanica Schur [Unplaced]	Unresolved		WCSP
Betula trichogemma (Hu ex P.C. Li) T. Hong	Synonym		TRO
Betula tricholepidea Kindb. [Unplaced]	Unresolved		WCSP
Betula triphylla Thunb. [Unplaced]	Unresolved		WCSP
Betula tristis Dippel [Invalid]	Synonym		WCSP
Betula tristis Wormsk. ex Link [Invalid]	Synonym		WCSP
Betula tundrarum Perfil.	Synonym		WCSP
Betula turfosa Weigel ex Rchb.	Synonym		WCSP
Betula turkestanica Litv.	Accepted		WCSP
Betula turunica P.A.Baranov	Synonym		WCSP
Betula tuturinii V.N.Vassil.	Accepted		WCSP
Betula uber (Ashe) Fernald	Synonym		WCSP
Betula × uliginosa Dugle	Accepted		WCSP
Betula ulmifolia Siebold & Zucc.	Synonym		WCSP
Betula ulmifolia var. costata (Trautv.) Regel	Synonym		WCSP
Betula ulmifolia var. glandulosa H.J.P.Winkl.	Synonym		WCSP
Betula ulmifolia var. sericea H.J.P.Winkl.	Synonym		WCSP
Betula ulmifolia var. subcordata (Regel) H.J.P.Winkl.	Synonym		WCSP
Betula × ungavensis Lepage	Synonym		WCSP
Betula urticifolia (Spach) Regel	Synonym		WCSP
Betula uschkanensis Sukaczev [Invalid]	Synonym		WCSP
Betula × utahensis Britton	Accepted		WCSP
Betula × utahensis Dugle	Unresolved		TRO
Betula utilis D.Don	Accepted		WCSP
Betula utilis var. glandulifera Regel	Synonym		WCSP
Betula utilis var. jacquemontii (Spach) H.J.P.Winkl.	Accepted		WCSP
Betula utilis subsp. jacquemontii (Spach) Kitam.	Synonym		WCSP
Betula utilis var. latifolia Regel	Synonym		WCSP
Betula utilis subsp. occidentalis Kitam.	Synonym		WCSP
Betula utilis var. occidentalis (Kitam.) Ashburner & A.D.Schill.	Accepted		WCSP
Betula utilis var. sinensis (Franch.) H.J.P.Winkl.	Synonym		WCSP
Betula utilis var. utilis	Accepted		WCSP
Betula vassiljevii Dylis	Synonym		WCSP
Betula vassiljevii Dyl.	Synonym		TRO
Betula velutina V.N.Vassil.	Synonym		WCSP
Betula verrucosa Ehrh.	Synonym		WCSP
Betula verrucosa var. arbuscula (Fr.) H.J.P.Winkl.	Synonym		WCSP
Betula verrucosa f. bircalensis Mela	Synonym		WCSP
Betula verrucosa var. bircalensis Mela	Synonym		TRO
Betula verrucosa var. dalecarlica (L.f.) Nyman	Synonym		WCSP
Betula verrucosa f. dalecarlica (L.f.) H.J.P.Winkl.	Synonym		WCSP
Betula verrucosa f. dalecarlica L. f.	Synonym		TRO
Betula verrucosa f. elegans Dippel	Synonym		WCSP
Betula verrucosa f. expansa Regel	Synonym		WCSP
Betula verrucosa f. fastigiata K.Koch	Synonym		WCSP
Betula verrucosa var. hybrida (Blom) Nyman	Synonym		WCSP
Betula verrucosa var. japonica (Miq.) A.Henry	Synonym		WCSP
Betula verrucosa var. lapponica Lindq.	Synonym		WCSP
Betula verrucosa f. lobata (Regel) Anders ex H.J.P.Winkl.	Synonym		WCSP
Betula verrucosa var. lobulata (Kit.) Nyman	Synonym		WCSP
Betula verrucosa var. microphylla (Wallr.) Fiek	Synonym		WCSP
Betula verrucosa var. obscura (Kotula ex Fiek) Gürke	Synonym		WCSP
Betula verrucosa subsp. obscura (Kotula ex Fiek) Á.Löve & D.Löve	Synonym		WCSP
Betula verrucosa var. odorata Nyman	Synonym		WCSP
Betula verrucosa subsp. oycoviensis Á. Löve & D. Löve	Synonym		TRO
Betula verrucosa subsp. oycowiensis (Besser) Nyman	Synonym		WCSP
Betula verrucosa var. oycowiensis (Besser) H.J.P.Winkl.	Synonym		WCSP
Betula verrucosa var. platyphylla (Sukaczev) Lindq.	Synonym		WCSP
Betula verrucosa var. saxatilis Lindq.	Synonym		WCSP
Betula victoris E.S.Husseinov	Synonym		WCSP
Betula viminea Kinulb.	Synonym		WCSP
Betula virgata Salisb. [Illegitimate]	Synonym		WCSP
Betula virgultosa Fr. ex Regel	Synonym		WCSP
Betula viridis Chaix	Synonym		WCSP
Betula viridis Vill.	Synonym		TRO
Betula vladimirii V.N.Vassil.	Synonym		WCSP
Betula × vologdensis Tzvelev	Accepted		WCSP
Betula vulcani H.Lév. & Vaniot [Unplaced]	Unresolved		WCSP
Betula wilsoniana C.K.Schneid.	Synonym		WCSP
Betula wilsonii Bean	Synonym		WCSP
Betula wiluica Sukaczev [Invalid]	Synonym		WCSP
Betula × winteri Dugle	Accepted		WCSP
Betula wutaica Mayr	Synonym		WCSP
Betula wuyiensis J.B.Xiao	Accepted		WCSP
Betula yoshimurae Miyabe & Tatew.	Synonym		WCSP
Betula × zimpelii Junge	Accepted		WCSP
Betula zinserlingii V.N.Vassil.	Accepted		WCSP
Betula zyzyphifolia C.Wang & S.L.Tung	Synonym		WCSP