| Arten: |
| Begonia abbottii Urb. |
| Begonia abdullahpieei Kiew |
| Begonia aberrans Irmsch. |
| Begonia aborensis Dunn |
| Begonia acaulis Merr. & L.M.Perry |
| Begonia acclivis Coyle |
| Begonia acerifolia Kunth |
| Begonia aceroides Irmsch. |
| Begonia acetosa Vell. |
| Begonia acetosella Craib |
| Begonia acida Vell. |
 |
| Begonia aconitifolia A.DC. |
| Begonia acuminatissima Merr. |
| Begonia acutifolia Jacq. |
 |
| Begonia acutiloba Liebm. |
| Begonia acutitepala K.Y.Guan & D.K.Tian |
| Begonia adenodes Irmsch. |
| Begonia adenopoda Lem. |
| Begonia adenostegia Stapf |
| Begonia admirabilis Brade |
| Begonia adpressa Sosef |
| Begonia adscendens C.B.Clarke |
| Begonia aenea Linden & André |
| Begonia aequata A.Gray |
| Begonia aequatoguineensis Sosef & Nguema |
| Begonia aequatorialis L.B.Sm. & B.G.Schub. |
| Begonia aequilateralis Irmsch. |
| Begonia aeranthos L.B.Sm. & B.G.Schub. |
| Begonia affinis Merr. |
| Begonia afromigrata J.J.de Wilde |
| Begonia aggeloptera N.Hallé |
| Begonia aguiabrancensis L.Kollmann |
| Begonia agusanensis Merr. |
| Begonia alba Merr. |
| Begonia albidula Brade |
| Begonia albobracteata Ridl. |
| Begonia albococcinea Hook. |
| Begonia albomaculata C.DC. ex Huber |
 |
Begonia × albopicta W.Bull
|
| Begonia alcarrasica J.Sierra |
| Begonia alchemilloides A.DC. |
| Begonia algaia L.B.Sm. & Wassh. |
| Begonia alice-clarkae Ziesenh. |
 |
| Begonia aliciae C.E.C.Fisch. |
| Begonia alicida C.B.Clarke |
| Begonia almedana Burt-Utley & Utley |
| Begonia alnifolia A.DC. |
| Begonia alpina L.B.Sm. & Wassh. |
| Begonia altamiroi Brade |
| Begonia altissima Ridl. |
| Begonia altoperuviana A.DC. |
| Begonia alvarezii Merr. |
| Begonia alveolata T.T.Yu |
| Begonia × amabilis Linden |
| Begonia amphioxus Sands |
| Begonia ampla Hook.f. |
| Begonia anaimalaiensis Bedd. |
| Begonia andamensis Parish ex C.B.Clarke |
| Begonia andersonii Kiew & S.Julia |
| Begonia andina Rusby |
| Begonia androrangensis Humbert |
| Begonia androturba Coyle |
| Begonia anemoniflora Irmsch. |
| Begonia angilogensis Merr. |
| Begonia angolensis Irmsch. |
| Begonia angraensis Brade |
| Begonia angularis Raddi |
 |
| Begonia angulata Vell. |
| Begonia angustilimba Merr. |
| Begonia angustiloba A.DC. |
| Begonia anisoptera Merr. |
| Begonia anisosepala Hook.f. |
| Begonia anjuanensis Humbert ex Aymonin & Bosser |
| Begonia ankaranensis Humbert ex Aymonin & Bosser |
| Begonia annobonensis A.DC. |
| Begonia annulata K.Koch |
 |
| Begonia anodifolia A.DC. |
| Begonia antaisaka Humbert |
| Begonia anthonyi Kiew |
| Begonia antongilensis Humbert |
| Begonia × antonietae Brade |
| Begonia antsingyensis Humbert ex Aymonin & Bosser |
| Begonia antsiranensis Aymonin & Bosser |
| Begonia apayaoensis Merr. |
| Begonia apparicioi Brade |
| Begonia aptera Blume |
| Begonia aptera Blume subsp. hirtissima Girm. & D.C.Thomas |
| Begonia arachnoidea C.I. Peng, Y. Liu & S.M. Ku |
| Begonia arborescens Raddi |
| Begonia arborescens var. confertiflora (Gardner) A.DC. |
| Begonia arborescens var. oxyphylla (A.DC.) S.F.Sm. |
 |
| Begonia arboreta Y.M.Shui |
| Begonia archboldiana Merr. & L.M.Perry |
| Begonia areolata Miq. |
| Begonia arfakensis (Gibbs) L.L.Forrest & Hollingsw. |
| Begonia argentea Linden |
| Begonia argenteomarginata Tebbitt |
| Begonia aridicaulis Ziesenh. |
| Begonia arnottiana (Wight) A.DC. |
| Begonia arrogans Irmsch. |
| Begonia articulata Irmsch. |
| Begonia artior Irmsch. |
| Begonia asperifolia Irmsch. |
| Begonia aspleniifolia Hook.f. ex A.DC. |
| Begonia assurgens Irmsch. ex Weberling |
| Begonia asteropyrifolia Y.M.Shui & W.H.Chen |
| Begonia asympeltata L.B.Sm. & Wassh. |
| Begonia atricha (Miq.) Miq. ex A.DC. |
| Begonia atroglandulosa Sosef |
| Begonia augustae Irmsch. |
| Begonia augustinei Hemsl. |
| Begonia aurantiflora C.I Peng, Yan Liu & S.M.Ku |
| Begonia auriculata Hook.f. |
| Begonia auritistipula Y.M.Shui & W.H.Chen |
| Begonia austroguangxiensis Y.M.Shui & W.H.Chen |
| Begonia austrotaiwanensis Y.K.Chen & C.I.Peng |
| Begonia awongii Sands |
| Begonia axillaris Ridl. |
| Begonia axillipara Ridl. |
| Begonia azuensis Urb. & Ekman |
| Begonia baccata Hook.f. |
| Begonia bagotiana Humbert ex Aymonin & Bosser |
| Begonia bahakensis Sands |
| Begonia bahiensis A.DC. |
| Begonia balansae C.DC. |
| Begonia balansana Gagnep. |
| Begonia balmisiana Balmis |
| Begonia bamaensis Yan Liu & C.I Peng |
| Begonia banaoensis J.Sierra |
| Begonia bangii Kuntze |
| Begonia baramensis Merr. |
| Begonia barbellata Ridl. |
| Begonia barborkae Halda |
| Begonia barkeri Knowles & Westc. |
| Begonia barkleyana L.B.Sm. |
| Begonia baronii Baker |
| Begonia barrigae L.B.Sm. & B.G.Schub. |
| Begonia bartlettiana Merr. & L.M.Perry |
| Begonia bataiensis Kiew |
| Begonia baturongensis Kiew |
| Begonia baumannii Lemoine ex Wittm. |
| Begonia baviensis Gagnep. |
| Begonia beccariana Ridl. |
| Begonia beccarii Warb. |
| Begonia beddomei Hook.f. |
| Begonia bekopakensis Aymonin & Bosser |
| Begonia bequaertii Robyns & Lawalrée |
| Begonia berhamanii Kiew |
| Begonia bernicei Aymard & G.A.Romero |
| Begonia bernieri A.DC. |
| Begonia beryllae Ridl. |
| Begonia besleriifolia Schott |
| Begonia betsimisaraka Humbert |
| Begonia bettinae Ziesenh. |
| Begonia bidentata Raddi |
| Begonia biflora T.C.Ku |
| Begonia bifolia Ridl. |
| Begonia bifurcata L.B.Sm. & B.G.Schub. |
| Begonia biguassuensis Brade |
| Begonia biliranensis Merr. |
| Begonia binuangensis Merr. |
| Begonia bipinnatifida J.J.Sm. |
| Begonia biserrata Lindl. |
| Begonia bissei J.Sierra |
| Begonia blancii M.Hughes & C.I Peng |
| Begonia bogneri Ziesenh. |
| Begonia boisiana Gagnep. |
| Begonia boissieri A.DC. |
| Begonia boiviniana A.DC. |
| Begonia boliviensis A.DC. |
| Begonia bolleana Urb. & Ekman |
| Begonia bolsteri Merr. |
| Begonia bonii Gagnep. |
| Begonia bonitoensis Brade |
| Begonia bonthainensis Hemsl. |
| Begonia bonus-henricus J.J.de Wilde |
| Begonia boraceiensis Handro |
| Begonia borneensis A.DC. |
| Begonia bosseri Keraudren |
| Begonia boucheana (Klotzsch) A.DC. |
| Begonia bouffordii C.I Peng |
| Begonia bowerae Ziesenh. |
 |
| Begonia brachybotrys Merr. & L.M.Perry |
| Begonia brachyclada Urb. & Ekman |
| Begonia brachypoda O.E.Schulz |
| Begonia bracteata Jack |
| Begonia bracteosa A.DC. |
| Begonia bradei Irmsch. |
| Begonia brandbygeana L.B.Sm. & Wassh. |
| Begonia brandisiana Kurz |
| Begonia brassii Merr. & L.M.Perry |
| Begonia breedlovei Burt-Utley |
| Begonia brevibracteata Kupicha |
| Begonia brevicaulis A.DC. |
| Begonia brevicordata L.B.Sm. & B.G.Schub. |
| Begonia brevicyma C.DC. |
| Begonia brevilobata Irmsch. |
| Begonia brevipedunculata Y.M.Shui |
| Begonia brevipes Merr. |
| Begonia brevipetala (A.DC.) Warb. |
 |
Begonia brevirimosa Irmsch.
|
| Begonia brevisetulosa C.Y.Wu |
| Begonia bridgesii A.DC. |
| Begonia broussonetiifolia A.DC. |
| Begonia bruneiana Sands |
| Begonia buchtienii Irmsch. |
| Begonia buddleiifolia A.DC. |
| Begonia bufoderma L.B.Sm. & Wassh. |
| Begonia buimontana Yamam. |
| Begonia bulbillifera Link & Otto |
| Begonia bullata Urb. & Ekman |
| Begonia burbidgei Stapf |
| Begonia burkillii Dunn |
| Begonia burmensis L.B.Sm. & Wassh. |
| Begonia burttii Kiew & S.Julia |
| Begonia buseyi Burt-Utley |
| Begonia cacauicola L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia caespitosa Jack |
| Begonia calcarea Ridl. |
| Begonia calcicola Merr. |
| Begonia calderonii Standl. |
| Begonia calliantha Merr. & L.M.Perry |
| Begonia callosa L.Kollmann |
| Begonia calvescens (Brade ex L.B.Sm. & R.C.Sm.) E.L.Jacques & Mamede |
| Begonia camposportoana Brade |
| Begonia canarana Miq. |
| Begonia candollei Ziesenh. |
| Begonia capanemae Brade |
| Begonia capensis L.f. |
| Begonia capillipes Gilg |
| Begonia capituliformis Irmsch. |
| Begonia caraguatatubensis Brade |
| Begonia cardiocarpa Liebm. |
| Begonia cardiophora Irmsch. |
| Begonia cariocana Brade ex L.B.Sm. & Wassh. |
| Begonia carletonii Standl. |
| Begonia carnosa Teijsm. & Binn. |
| Begonia carnosula Ridl. |
| Begonia caroliniifolia Regel |
| Begonia carpinifolia Liebm. |
| Begonia carrieae Ziesenh. |
| Begonia casiguranensis Quisumb. & Merr. |
| Begonia castaneifolia Otto & Dietr. |
| Begonia castilloi Merr. |
| Begonia catharinensis Brade |
| Begonia cathayana Hemsl. |
| Begonia cathcartii Hook.f. & Thomson |
| Begonia caudata Merr. |
| Begonia cauliflora Sands |
| Begonia cavaleriei H.Lév. |
| Begonia cavallyensis A.Chev. |
| Begonia cavum Ziesenh. |
| Begonia cebadillensis Houghton ex L.B.Sm. & Schub. |
| Begonia cehengensis T.C.Ku |
| Begonia celebica Irmsch. |
| Begonia cerasiphylla L.B.Sm. & Wassh. |
| Begonia ceratocarpa S.H.Huang & Y.M.Shui |
| Begonia chaetocarpa Kuntze |
| Begonia chaiana Kiew & S.Julia |
| Begonia chiapensis Burt-Utley |
| Begonia chiasmogyna M.Hughes |
| Begonia chingii Irmsch. |
| Begonia chishuiensis T.C.Ku |
| Begonia chitoensis Tang S.Liu & M.J.Lai |
| Begonia chivatoa Ziesenh. |
| Begonia chlorandra Sands |
| Begonia chlorocarpa Irmsch. ex Sands |
| Begonia chlorolepis L.B.Sm. & B.G.Schub. |
| Begonia chloroneura P.Wilkie & Sands |
| Begonia chlorosticta Sands |
| Begonia chongii Sands |
| Begonia chuniana C.Y.Wu |
| Begonia chuyunshanensis C.I Peng & Y.K.Chen |
| Begonia ciliifera Merr. |
| Begonia ciliobracteata Warb. |
| Begonia cincinnifera Irmsch. |
| Begonia cinnabarina Hook. |
| Begonia circumlobata Hance |
| Begonia cirrosa L.B.Sm. & Wassh. |
| Begonia cladocarpoides Humbert ex Aymonin & Bosser |
| Begonia cladotricha M.Hughes |
| Begonia clarkei Hook.f. |
| Begonia clavicaulis Irmsch. |
| Begonia clemensiae Merr. & L.M.Perry |
| Begonia cleopatrae Coyle |
| Begonia clypeifolia Hook.f. |
| Begonia coccinea Hook. |
| Begonia coelocentroides Y.M.Shui & Z.D.Wei |
| Begonia cognata Irmsch. |
| Begonia collaris Brade |
| Begonia collina Irmsch. |
| Begonia collisiae Merr. |
| Begonia colombiana L.B.Sm. & B.G.Schub. |
| Begonia colorata Warb. |
| Begonia comata Kuntze |
| Begonia comestibilis D.C.Thomas & Ardi |
| Begonia comorensis Warb. |
| Begonia compacticaulis Irmsch. |
| Begonia concanensis A.DC. |
| Begonia conchifolia A.Dietr. |
 |
| Begonia concinna Schott |
| Begonia confinis L.B.Sm. & Wassh. |
| Begonia confusa L.B.Sm. & B.G.Schub. |
| Begonia congesta Ridl. |
| Begonia conipila Irmsch. ex Kiew |
| Begonia consanguinea Merr. |
| Begonia consobrina Irmsch. |
| Begonia contracta Warb. |
| Begonia convallariodora C.DC. |
| Begonia convolvulacea (Klotzsch) A.DC. |
 |
| Begonia cooperi C.DC. |
| Begonia copelandii Merr. |
| Begonia copeyana C.DC. |
| Begonia coptidifolia H.G.Ye, F.G.Wang, Y.S.Ye & C.I Peng |
| Begonia coptidimontana C.Y.Wu |
| Begonia cordata Vell. |
| Begonia cordifolia (Wight) Thwaites |
| Begonia coriacea Hassk. |
| Begonia corneri Kiew |
| Begonia cornitepala Irmsch. |
| Begonia cornuta L.B.Sm. & B.G.Schub. |
| Begonia coronensis Merr. |
| Begonia corredorana C.DC. |
| Begonia corrugata Kiew & S.Julia |
| Begonia corzoensis Ziesenh. |
| Begonia coursii Humbert ex Aymonin |
| Begonia cowellii Nash |
| Begonia crassicaulis Lindl. |
| Begonia crateris Exell |
| Begonia crenata Dryand. |
| Begonia crinita Oliv. ex Hook.f. |
| Begonia crispipila Elmer |
| Begonia crispula Brade |
 |
| Begonia cristata Warb. ex L.B.Sm. & Wassh. |
| Begonia cristobalensis Ziesenh. |
| Begonia croatii Burt-Utley |
| Begonia crocea C.I Peng |
| Begonia cryptocarpa L.B.Sm. & B.G.Schub. |
| Begonia crystallina Y.M.Shui & W.H.Chen |
| Begonia cuatrecasana L.B.Sm. & B.G.Schub. |
| Begonia cubensis Hassk. |
 |
| Begonia cucphuongensis H.Q.Nguyen & Tebbitt |
| Begonia cucullata Willd. |
 |
| Begonia cucullata var. hookeri (A.DC.) L.B.Sm. & Schub. |
 |
Begonia cucullata var. spatulata (Lodd.) Golding
|
| Begonia cucullata var. subcucullata (C.DC.) ined. |
| Begonia cucurbitifolia C.Y.Wu |
| Begonia cuernavacensis Ziesenh. |
| Begonia cumingiana (Klotzsch) A.DC. |
| Begonia cumingii A.Gray |
| Begonia cuneatifolia Irmsch. |
| Begonia cupreata Henriq. |
| Begonia curtii L.B.Sm. & B.G.Schub. |
| Begonia curtisii Ridl. |
| Begonia curvicarpa S.M.Ku, C.I Peng & Yan Liu |
| Begonia cyanescens Sands |
| Begonia cyathophora Poepp. & Endl. |
| Begonia cylindrata L.B.Sm. & B.G.Schub. |
| Begonia cylindrica D.R.Liang & X.X.Chen |
| Begonia cymbalifera L.B.Sm. & B.G.Schub. |
| Begonia davidsonae Standl. ex L.B.Sm. & Schub. |
| Begonia davisii Burbridge |
| Begonia daweishanensis S.H.Huang & Y.M.Shui |
| Begonia daxinensis T.C.Ku |
| Begonia dealbata Liebm. |
| Begonia debaoensis C.I Peng, Yan Liu & S.M.Ku |
| Begonia debilis King |
| Begonia decandra Pav. ex A.DC. |
| Begonia decaryana Humbert ex Aymonin & Bosser |
| Begonia declinata Vell. |
| Begonia decora Stapf |
| Begonia delicatula Parish ex C.B.Clarke |
| Begonia deliciosa Linden ex Fotsch (?) |
 |
| Begonia demissa Craib |
| Begonia densifolia Irmsch. |
| Begonia densiretis Irmsch. |
| Begonia dentatiloba A.DC. |
| Begonia dentatobracteata C.Y.Wu |
| Begonia denticulata Kunth |
| Begonia depauperata Schott |
| Begonia descoleana L.B.Sm. & B.G.Schub. |
| Begonia dewildei Sosef |
| Begonia diadema Linden ex Rodigas (?) |
 |
| Begonia dichotoma Jacq. |
 |
| Begonia didyma D.C.Thomas & Ardi |
| Begonia dielsiana E.Pritz. ex Diels |
| Begonia dietrichiana Irmsch. |
 |
| Begonia diffusa L.B.Sm. & B.G.Schub. |
| Begonia diffusiflora Merr. & L.M.Perry |
| Begonia digitata Raddi |
| Begonia digyna Irmsch. |
| Begonia dioica Buch.-Ham. ex D.Don |
| Begonia dipetala Graham |
 |
| Begonia discrepans Irmsch. |
| Begonia discreta Craib |
| Begonia divaricata Irmsch. |
| Begonia diversistipulata Irmsch. |
| Begonia diwolii Kiew |
| Begonia djamuensis Irmsch. |
| Begonia dodsonii L.B.Sm. & Wassh. |
| Begonia dolichotricha Merr. |
| Begonia domingensis A.DC. |
| Begonia donkelaariana Lem. |
| Begonia dosedlae Gilli |
| Begonia dregei Otto & Dietr. |
| Begonia dressleri Burt-Utley |
| Begonia droopiae Ardi |
| Begonia dryadis Irmsch. |
| Begonia duclouxii Gagnep. |
| Begonia dugandiana L.B.Sm. & B.G.Schub. |
| Begonia duncan-thomasii Sosef |
| Begonia dux C.B.Clarke |
| Begonia eberhardtii Gagnep. |
| Begonia ebolowensis Engl. |
 |
| Begonia echinosepala Regel |
 |
| Begonia eciliata O.E.Schulz |
| Begonia edanoi Merr. |
| Begonia edmundoi Brade |
 |
| Begonia edulis H.Lév. |
| Begonia egregia N.E.Br. |
| Begonia eiromischa Ridl. |
 |
Begonia elaeagnifolia Hook.f.
|
 |
| Begonia elatostematoides Merr. |
| Begonia elatostemma Ridl. |
| Begonia elatostemmoides Hook.f. |
| Begonia eliassii Warb. |
| Begonia elisabethae Kiew |
| Begonia elmeri Merr. |
| Begonia emeiensis C.M.Hu |
| Begonia eminii Warb. |
| Begonia engleri Gilg |
| Begonia epibaterium Mart. ex A.DC. |
| Begonia epipsila Brade |
 |
| Begonia erecta Vell. |
| Begonia erectocaulis Sosef |
| Begonia erectotricha Sosef |
| Begonia erminea L'Hér. |
| Begonia erythrocarpa A.DC. |
| Begonia erythrogyna Sands |
| Begonia esculenta Merr. |
| Begonia espiritosantensis E.L.Jacques & Mamede |
| Begonia estrellensis C.DC. |
| Begonia euryphylla L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia eutricha Sands |
| Begonia everettii Merr. |
| Begonia exalata C.DC. |
| Begonia exigua Irmsch. |
| Begonia exilis O.E.Schulz |
| Begonia extensa L.B.Sm. & B.G.Schub. |
| Begonia extranea L.B.Sm. & B.G.Schub. |
| Begonia fabulosa L.B.Sm. & Wassh. |
 |
Begonia fagifolia Fisch.
|
| Begonia falcifolia Hook.f. |
| Begonia falciloba Liebm. |
| Begonia fangii Y.M.Shui & C.I Peng |
| Begonia fasciculata Jack |
| Begonia fasciculiflora Merr. |
| Begonia faustinoi Burt-Utley & Utley |
| Begonia fellereriana Irmsch. |
| Begonia fengii T.C.Ku |
| Begonia fenicis Merr. |
| Begonia fernaldiana L.B.Sm. & B.G.Schub. |
| Begonia fernandoi-costae Irmsch. |
| Begonia ferramica N.Hallé |
| Begonia ferruginea L.f. |
| Begonia festiva Craib |
| Begonia fibrosa C.B.Clarke |
| Begonia fiebrigii C.DC. |
| Begonia filibracteosa Irmsch. |
| Begonia filiformis Irmsch. |
| Begonia fimbriata Liebm. |
| Begonia fimbribracteata Y.M.Shui & W.H.Chen |
| Begonia fimbristipula Hance |
| Begonia fischeri Schrank |
| Begonia fissistyla Irmsch. |
| Begonia flacca Irmsch. |
| Begonia flaccidissima Kurz |
| Begonia flagellaris H.Hara |
| Begonia flaviflora H.Hara |
| Begonia flexicaulis Ridl. |
| Begonia flexula Ridl. |
| Begonia floccifera Bedd. |
 |
| Begonia fluminensis Brade |
| Begonia foliosa Kunth |
 |
| Begonia forbesii King |
| Begonia fordii Irmsch. |
| Begonia forgetiana Hemsl. |
| Begonia formosana (Hayata) Masam. |
| Begonia formosissima Sandwith |
| Begonia forrestii Irmsch. |
| Begonia foveolata Irmsch. |
| Begonia foxworthyi Burkill ex Ridl. |
| Begonia francisiae Ziesenh. |
| Begonia francoisii Guillaumin |
| Begonia fraseri Kiew |
| Begonia friburgensis Brade |
| Begonia froebelii A.DC. |
| Begonia fruticella Ridl. |
| Begonia fruticosa (Klotzsch) A.DC. |
| Begonia fuchsiiflora (A.DC.) A.I.Baranov & F.A.Barkley |
| Begonia fuchsioides Hook. |
| Begonia fulvosetulosa Brade |
| Begonia fulvovillosa Warb. |
| Begonia furfuracea Hook.f. |
| Begonia fusca Liebm. |
| Begonia fuscisetosa Sands |
| Begonia fuscocaulis Brade |
| Begonia fusialata Warb. |
| Begonia fusibulba C.DC. |
| Begonia fusicarpa Irmsch. |
| Begonia gabonensis J.J.de Wilde |
| Begonia gagnepainiana Irmsch. |
| Begonia gamolepis L.B.Sm. & B.G.Schub. |
| Begonia garagarana C.DC. |
| Begonia gardneri A.DC. |
| Begonia garrettii Craib |
| Begonia garuvae L.B.Sm. & R.C.Sm. |
| Begonia gehrtii Irmsch. |
| Begonia gemella Warb. ex L.B.Sm. & Wassh. |
| Begonia geminiflora L.B.Sm. & Wassh. |
| Begonia gemmipara Hook.f. & Thomson |
| Begonia gemmirhiza H.Lév. |
| Begonia gentilii De Wild. |
 |
| Begonia geoffrayi Gagnep. |
| Begonia geraniifolia Hook. |
| Begonia geranioides Hook.f. |
| Begonia gesnerioides L.B.Sm. & B.G.Schub. |
| Begonia gibbsiae Irmsch. ex Sands |
| Begonia gigabracteata Hong Z.Li & H.Ma |
| Begonia gigaphylla Y.M.Shui & W.H.Chen |
| Begonia gilgiana Irmsch. |
| Begonia gitingensis Elmer |
| Begonia glaberrima Urb. & Ekman |
| Begonia glabra Aubl. |
| Begonia glabricaulis Irmsch. |
| Begonia glandulifera Griseb. |
| Begonia glandulosa A.DC. ex Hook. |
| Begonia glauca (Klotzsch) Ruiz & Pav. ex A.DC. |
| Begonia glaucoides Irmsch. |
| Begonia glechomifolia C.M.Hu |
| Begonia glutinosa Kiew |
| Begonia goegoensis N.E.Br. |
| Begonia goldingiana L.Kollmann & A.P.Fontana |
| Begonia gomantongensis Kiew |
| Begonia goniotis C.B.Clarke |
| Begonia gorgonea Tebbitt |
| Begonia gossweileri Irmsch. |
| Begonia goudotii A.DC. |
| Begonia gracilior Burt-Utley & McVaugh |
| Begonia gracilipes Merr. |
| Begonia gracilis Kunth |
| Begonia gracillima A.DC. |
| Begonia grandipetala Irmsch. |
| Begonia grandis Dryand. |
 |
| Begonia grandis subsp. grandis |
| Begonia grandis subsp. sinensis (A.DC.) Irmsch. |
| Begonia grandis var. unialata Irmsch. |
| Begonia grantiana Craib |
| Begonia grata Geddes |
| Begonia griffithiana (A.DC.) Warb. |
| Begonia grisea A.DC. |
| Begonia groenewegensis K.Koch & Fint. |
| Begonia guaduensis Kunth |
 |
| Begonia guangxiensis C.Y.Wu |
| Begonia guaniana H.Ma & Hong Z.Li |
| Begonia guatemalensis Van Houtte ex Galeotti |
| Begonia gueritziana Gibbs |
| Begonia guishanensis S.H.Huang & Y.M.Shui |
| Begonia gulinqingensis S.H.Huang & Y.M.Shui |
| Begonia gungshanensis C.Y.Wu |
| Begonia gunnerifolia Linden & André |
| Begonia gutierrezii Coyle |
| Begonia guttapila D.C.Thomas & Ardi |
| Begonia guttata Wall. ex A.DC. |
| Begonia hahiepiana H.Q.Nguyen & Tebbitt |
| Begonia hainanensis Chun & F.Chun |
| Begonia halconensis Merr. |
| Begonia handelii Irmsch. |
| Begonia handelii var. prostrata (Irmsch.) Tebbitt |
| Begonia handelii var. rubropilosa (S.H.Huang & Y.M.Shui) C.I Peng |
| Begonia handroi Brade |
| Begonia haniffii Burkill |
| Begonia harlingii L.B.Sm. & Wassh. |
| Begonia harmandii Gagnep. |
| Begonia hasskarliana (Miq.) Miq. ex A.DC. |
| Begonia hassleri C.DC. |
| Begonia hatacoa Buch.-Ham. ex D.Don |
| Begonia hatacoa var. hatacoa |
| Begonia hatacoa var. meisneri (Wall. ex C.B.Clarke) Golding |
| Begonia havilandii Ridl. |
| Begonia hayamiana Nob.Tanaka |
| Begonia hayatae Gagnep. |
| Begonia hekensis D.C.Thomas |
| Begonia hekouensis S.H.Huang |
| Begonia heliostrophe Kiew |
| Begonia hemsleyana Hook.f. |
| Begonia henryi Hemsl. |
| Begonia heracleifolia Cham. & Schltdl. |
| Begonia herbacea Vell. |
| Begonia heringeri Brade |
| Begonia hernandioides Merr. |
| Begonia herrerae L.B.Sm. & B.G.Schub. |
| Begonia herteri Irmsch. |
| Begonia herveyana King |
| Begonia heterochroma Sosef |
| Begonia heteroclinis Miq. ex Koord. |
| Begonia heteropoda Baker |
| Begonia hexandra Irmsch. |
| Begonia hexaptera Sands |
| Begonia heydei C.DC. |
| Begonia hidirii Tawan, Ipor & Meekiong |
| Begonia hilariana A.DC. |
| Begonia hintoniana L.B.Sm. & B.G.Schub. |
| Begonia hirsuta Aubl. |
| Begonia hirsuticaulis Irmsch. |
| Begonia hirsutula Hook.f. |
| Begonia hirta (Klotzsch) L.B.Sm. & B.G.Schub. |
| Begonia hirtella Link |
| Begonia hispida Schott ex A.DC. |
| Begonia hispidissima Zipp. ex Koord. |
| Begonia hispidivillosa Ziesenh. |
| Begonia hitchcockii Irmsch. |
| Begonia hoehneana Irmsch. |
| Begonia holmnielseniana L.B.Sm. & Wassh. |
| Begonia holosericea Teijsm. & Binn. |
| Begonia holtonis A.DC. |
 |
| Begonia holttumii Irmsch. |
| Begonia homonyma Steud. |
| Begonia hondurensis Burt-Utley & Utley |
| Begonia hongkongensis F.W.Xing |
| Begonia hookeriana Gardner |
| Begonia horsfieldii (Miq.) Miq. ex A.DC. |
| Begonia horticola Irmsch. |
| Begonia houttuynioides T.T.Yu |
| Begonia howii Merr. & Chun |
| Begonia huangii Y.M.Shui & W.H.Chen |
| Begonia hubertii Ziesenh. |
| Begonia huegelii (Klotzsch) A.DC. |
| Begonia hullettii Ridl. |
| Begonia humbertii Keraudren |
| Begonia humboldtiana Gibbs |
| Begonia humericola Sands |
| Begonia humilicaulis Irmsch. |
| Begonia humilis Aiton |
| Begonia humillima L.B.Sm. & Wassh. |
 |
Begonia hydrocotylifolia Otto ex Hook.
|
| Begonia hydrophylloides L.B.Sm. & B.G.Schub. |
| Begonia hymenocarpa C.Y.Wu |
| Begonia hymenophylla Gagnep. |
| Begonia hymenophylloides F.K.Ward ex L.B.Sm. & Wassh. |
| Begonia ibitiocensis E.L.Jacques & Mamede |
| Begonia ignea (Klotzsch) Warsz. ex A.DC. |
| Begonia ignorata Irmsch. |
| Begonia imbricata Sands |
| Begonia imitans Irmsch. |
| Begonia imperfecta Irmsch. |
| Begonia imperialis Lem. |
 |
| Begonia incarnata Link & Otto |
 |
| Begonia incerta Craib |
| Begonia incisa A.DC. |
| Begonia incisoserrata (Klotzsch) A.DC. |
| Begonia incondita Craib |
| Begonia inconspicua Brade |
| Begonia inculta Irmsch. |
| Begonia inostegia Stapf |
| Begonia insueta D.C.Thomas & Ardi |
| Begonia insularis Brade |
| Begonia insularum Irmsch. |
| Begonia integerrima Spreng. |
| Begonia integrifolia Dalzell |
| Begonia intermixta Irmsch. |
 |
| Begonia inversa Irmsch. |
| Begonia involucrata Liebm. |
| Begonia ionophylla Irmsch. |
| Begonia iridescens Dunn |
| Begonia irmscheri L.B.Sm. & B.G.Schub. |
| Begonia isabelensis Quisumb. & Merr. |
| Begonia isalensis Humbert ex Aymonin & Bosser |
| Begonia isoptera Dryand. ex Sm. |
| Begonia isopterocarpa Irmsch. |
| Begonia isopteroidea King |
| Begonia itaguassuensis Brade |
| Begonia itapavensis Brade |
| Begonia itatiaiensis Brade |
| Begonia itatinensis Irmsch. ex Brade |
| Begonia iucunda Irmsch. |
| Begonia jagorii Warb. |
| Begonia jaliscana Burt-Utley |
| Begonia jamaicensis A.DC. |
| Begonia jarmilae Halda |
| Begonia jayaensis Kiew |
| Begonia jenmanii Tutin |
| Begonia jiewhoei Kiew |
| Begonia jingxiensis D.Fang & Y.G.Wei |
 |
Begonia jocelinoi Brade
|
| Begonia johnstonii Oliv. ex Hook.f. |
| Begonia josephi A.DC. |
| Begonia juliana Loefgr. ex Irmsch. |
 |
| Begonia juliasangii Kiew |
| Begonia juninensis Irmsch. |
| Begonia juntasensis Kuntze |
| Begonia jureiensis S.J.Gomes da Silva & Mamede |
| Begonia kachak K.G.Pearce |
| Begonia kachinensis Nob.Tanaka |
| Begonia kalabenonensis Humbert ex Aymonin & Bosser |
| Begonia kalbreyeri (Oliv.) L.B.Sm. & B.G.Schub. |
| Begonia kaniensis Irmsch. |
| Begonia karperi J.C.Arends |
| Begonia karwinskyana A.DC. |
| Begonia kasutensis K.G.Pearce |
| Begonia keeana Kiew |
| Begonia keithii Kiew |
| Begonia kelliana Irmsch. |
| Begonia kenworthyae Ziesenh. |
| Begonia keraudreniae Bosser |
| Begonia kerrii Craib |
| Begonia kerstingii Irmsch. |
| Begonia khasiana C.B.Clarke |
| Begonia kiamfeei Kiew & S.Julia |
| Begonia killipiana L.B.Sm. & B.G.Schub. |
| Begonia kinabaluensis Sands |
| Begonia kingdon-wardii Tebbitt |
| Begonia kingiana Irmsch. |
| Begonia kisuluana Büttner |
| Begonia klemmei Merr. |
| Begonia klossii Ridl. |
| Begonia knoopii Ziesenh. |
| Begonia koksunii Kiew |
| Begonia komoensis Irmsch. |
| Begonia konderreisiana L.B.Sm. & R.C.Sm. |
| Begonia koordersii Warb. ex L.B.Sm. & Wassh. |
| Begonia kortsiae Ziesenh. |
| Begonia kouytcheouensis Guillaumin |
| Begonia krystofii Halda |
| Begonia kuhlmannii Brade |
 |
| Begonia kui C.I Peng |
| Begonia kunthiana Walp. |
| Begonia kurakura Tawan, Ipor & Meekiong |
| Begonia labordei H.Lév. |
| Begonia laccophora Sands |
| Begonia lacera Merr. |
| Begonia lacerata Irmsch. |
| Begonia lachaoensis Ziesenh. |
| Begonia lacunosa Warb. |
| Begonia laevis Ridl. |
| Begonia lagunensis Elmer |
| Begonia lailana Kiew & Geri |
| Begonia lambii Kiew |
| Begonia laminariae Irmsch. |
| Begonia lancangensis S.H.Huang |
| Begonia lanceolata Vell. |
| Begonia lancifolia Merr. |
| Begonia lancilimba Merr. |
| Begonia langbianensis Baker f. |
| Begonia lansbergeae L.Linden & Rodigas |
| Begonia lanstyakii Brade |
| Begonia lanternaria Irmsch. |
| Begonia laporteifolia Warb. |
| Begonia larorum L.B.Sm. & Wassh. |
| Begonia laruei M.Hughes |
| Begonia lasioura D.C.Thomas & Ardi |
| Begonia latistipula Merr. |
| Begonia lauterbachii Warb. |
| Begonia laxa L.B.Sm. & B.G.Schub. |
| Begonia layang-layang Kiew |
| Begonia lazat Kiew & Reza Azmi |
| Begonia lealii Brade |
| Begonia leandrii Humbert ex Aymonin & Bosser |
| Begonia leathermaniae O'Reilly & Kareg. |
| Begonia lecomtei Gagnep. |
| Begonia ledermannii Irmsch. |
| Begonia lehmannii (Irmsch.) L.B.Sm. & B.G.Schub. |
| Begonia leivae J.Sierra |
| Begonia lempuyangensis Girm. |
| Begonia lemurica Keraudren |
| Begonia lengguanii Kiew |
| Begonia leopoldinensis L.Kollmann |
| Begonia lepida Blume |
| Begonia lepidella Ridl. |
| Begonia leprosa Hance |
| Begonia leptantha C.B.Rob. |
| Begonia leptoptera H.Hara |
| Begonia leptostyla Irmsch. |
| Begonia letestui J.J.de Wilde |
| Begonia letouzeyi Sosef |
| Begonia leucantha Ridl. |
| Begonia leucochlora Sands |
| Begonia leuconeura Urb. & Ekman |
| Begonia leucosticta Warb. |
| Begonia leucotricha Sands |
| Begonia libanensis Urb. |
| Begonia libera (L.B.Sm. & B.G.Schub.) L.B.Sm. & B.G.Schub. |
| Begonia lignescens Morton |
| Begonia limprichtii Irmsch. |
| Begonia lindleyana Walp. |
| Begonia lindmanii Brade |
| Begonia linearifolia J.Sierra |
| Begonia lineolata Brade |
| Begonia lipingensis Irmsch. |
| Begonia lipolepis L.B.Sm. |
| Begonia lipolepis var. luteyniorum (L.B.Sm. & Wassh.) Dorr |
| Begonia listada L.B.Sm. & Wassh. |
| Begonia lithophila C.Y.Wu |
| Begonia littleri Merr. |
| Begonia liuyanii C.I Peng, S.M.Ku & W.C.Leong |
| Begonia lobbii (Hassk.) A.DC. |
| Begonia loheri Merr. |
| Begonia lombokensis Girm. |
| Begonia lomensis Britton & Wilson |
| Begonia longanensis C.Y.Wu |
| Begonia longialata K.Y.Guan & D.K.Tian |
| Begonia longibarbata Brade |
| Begonia longibractea Merr. |
| Begonia longicarpa K.Y.Guan & D.K.Tian |
| Begonia longicaulis Ridl. |
| Begonia longifolia Blume |
| Begonia longimaculata Irmsch. |
| Begonia longinoda Merr. |
| Begonia longipedunculata Golding & Kareg. |
| Begonia longipetiolata Gilg |
 |
| Begonia longirostris Benth. |
| Begonia longiscapa Warb. |
| Begonia longiseta Irmsch. |
| Begonia longistipula Merr. |
| Begonia longistyla Y.M.Shui & W.H.Chen |
| Begonia longivillosa A.DC. |
| Begonia lopensis Sosef & M.E.Leal |
| Begonia lophoptera Rolfe |
| Begonia loranthoides Hook.f. |
| Begonia loranthoides subsp. loranthoides |
| Begonia loranthoides subsp. rhopalocarpa (Warb.) J.J.de Wilde |
| Begonia louis-williamsii Burt-Utley |
| Begonia lowiana King |
| Begonia lubbersii E.Morren |
| Begonia lucidissima Golding & Kareg. |
| Begonia lucifuga Irmsch. |
| Begonia ludicra A.DC. |
 |
| Begonia ludwigii Irmsch. |
| Begonia lugonis L.B.Sm. & Wassh. |
| Begonia lukuana Y.C.Liu & C.H.Ou |
| Begonia lunatistyla Irmsch. |
| Begonia luochengensis S.M.Ku, C.I Peng & Yan Liu |
| Begonia lushaiensis C.E.C.Fisch. |
| Begonia lutea L.B.Sm. & B.G.Schub. |
| Begonia luxurians Scheidw. |
 |
| Begonia luzhaiensis T.C.Ku |
| Begonia luzonensis Warb. |
| Begonia lyallii A.DC. |
| Begonia lyman-smithii Burt-Utley & Utley |
| Begonia lyniceorum Burt-Utley |
| Begonia macduffieana L.B.Sm. & B.G.Schub. |
| Begonia macgregorii Merr. |
| Begonia machrisiana L.B.Sm. & B.G.Schub. |
| Begonia macintyreana M.Hughes |
| Begonia macra A.DC. |
| Begonia macrocarpa Warb. |
| Begonia macrotis Vis. |
| Begonia macrotoma Irmsch. |
| Begonia maculata Raddi |
 |
| Begonia madaiensis Kiew |
| Begonia madecassa Keraudren |
| Begonia maestrensis Urb. |
| Begonia magdalenae L.B.Sm. & B.G.Schub. |
| Begonia magdalenensis Brade |
| Begonia majungaensis Guillaumin |
| Begonia malabarica Lam. |
 |
| Begonia malachosticta Sands |
| Begonia malindangensis Merr. |
| Begonia malipoensis S.H.Huang & Y.M.Shui |
| Begonia malmquistiana Irmsch. |
| Begonia mamutensis Sands |
| Begonia mananjebensis Humbert |
| Begonia mangorensis Humbert |
| Begonia manhaoensis S.H.Huang & Y.M.Shui |
| Begonia manicata Brongn. |
 |
| Begonia manillensis A.DC. |
| Begonia mannii Hook.f. |
 |
| Begonia maracayuensis Parodi |
| Begonia mariae L.B.Sm. |
| Begonia mariannensis Wassh. & McClellan |
| Begonia mariti Burt-Utley |
| Begonia marnieri Keraudren |
| Begonia marojejyensis Humbert |
| Begonia martabanica A.DC. |
| Begonia masarangensis Irmsch. |
| Begonia mashanica D.Fang & D.H.Qin |
| Begonia masoalaensis M.Hughes |
 |
| Begonia masoniana Irmsch. ex Ziesenh. |
 |
| Begonia matogrossensis L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia mattos-silvae L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia maurandiae A.DC. |
| Begonia maxwelliana King |
| Begonia mayasiana L.B.Sm. & B.G.Schub. |
| Begonia maynensis A.DC. |
| Begonia mazae Ziesenh. |
 |
| Begonia mbangaensis Sosef |
| Begonia mearnsii Merr. |
| Begonia media Merr. & L.M.Perry |
| Begonia medusae Linden |
| Begonia megacarpa Merr. |
| Begonia megalantha Merr. |
| Begonia megalophyllaria C.Y.Wu |
| Begonia megaptera A.DC. |
| Begonia melikopia Kiew |
| Begonia mekonggensis Girm. & Wiriad. |
| Begonia membranacea A.DC. |
| Begonia mendumae M.Hughes |
| Begonia menglianensis Y.Y.Qian |
| Begonia mengtzeana Irmsch. |
| Begonia meridensis A.DC. |
| Begonia meriraiensis S.Julia & Kiew |
| Begonia merrittii Merr. |
| Begonia mexicana H.Karst. ex C.Chev. (?) |
 |
| Begonia meyeri-johannis Engl. |
| Begonia meysseliana Linden |
| Begonia michoacana L.B.Sm. & B.G.Schub. |
| Begonia micranthera Griseb. |
| Begonia microcarpa A.DC. |
| Begonia microptera Hook.f. |
 |
 |
| Begonia microsperma Warb. |
| Begonia mildbraedii Gilg |
| Begonia militaris L.B.Sm. & B.G.Schub. |
| Begonia mindanaensis Warb. |
| Begonia mindorensis Merr. |
| Begonia minicarpa H.Hara |
| Begonia minjemensis Irmsch. |
| Begonia minor Jacq. |
| Begonia minuta Sosef |
| Begonia minutiflora Sands |
| Begonia minutifolia N.Hallé |
| Begonia miranda Irmsch. |
| Begonia modestiflora Kurz |
| Begonia molinana Burt-Utley |
| Begonia molleri (C.DC.) Warb. |
| Begonia mollicaulis Irmsch. |
| Begonia mollis A.DC. |
| Begonia monadelpha (Klotzsch) Ruiz & Pav. ex A.DC. |
| Begonia monantha Warb. |
| Begonia monicae Aymonin & Bosser |
| Begonia monophylla Pav. ex A.DC. |
| Begonia montana (A.DC.) Warb. |
| Begonia montis-bismarckii Warb. |
| Begonia montis-elephantis J.J.de Wilde |
| Begonia mooreana (Irmsch.) L.L.Forrest & Hollingsw. |
| Begonia morelii Irmsch. ex Kareg. |
| Begonia morifolia T.T.Yu |
| Begonia morii Burt-Utley |
| Begonia morsei Irmsch. |
| Begonia moszkowskii Irmsch. |
| Begonia moysesii Brade |
| Begonia mucronistipula C.DC. |
| Begonia muliensis T.T.Yu |
| Begonia multangula Blume |
| Begonia multibracteata Girm. |
| Begonia multidentata Warb. |
| Begonia multinervia Liebm. |
| Begonia multijugata M.Hughes |
| Begonia multistaminea Burt-Utley |
| Begonia muricata Blume |
| Begonia murina Craib |
| Begonia murudensis Merr. |
| Begonia mystacina L.B.Sm. & Wassh. |
| Begonia nagaensis Kiew & S.Julia |
| Begonia nana L'Hér. |
| Begonia nantoensis M.J.Lai & N.J.Chung |
| Begonia napoensis L.B.Sm. & Wassh. |
| Begonia naumoniensis Irmsch. |
| Begonia neglecta A.DC. |
| Begonia negrosensis Elmer |
| Begonia nelumbiifolia Cham. & Schltdl. |
 |
| Begonia nemoralis L.B.Sm. & B.G.Schub. |
| Begonia neocomensium A.DC. |
| Begonia neoharlingii L.B.Sm. & Wassh. |
| Begonia neoperrieri Humbert ex Aymonin & Bosser |
| Begonia neopurpurea L.B.Sm. & Wassh. |
| Begonia nepalensis (A.DC.) Warb. |
 |
| Begonia nevadensis Dorr |
| Begonia niahensis K.G.Pearce |
| Begonia nigritarum Steud. |
| Begonia ningmingensis D.Fang, Y.G.Wei & C.I Peng |
| Begonia nivea Parish ex Kurz |
| Begonia nobmanniae D.C.Thomas & Ardi |
| Begonia nossibea A.DC. |
| Begonia notata Craib |
| Begonia notiophila Urb. |
| Begonia novalombardiensis L.Kollmann |
| Begonia novogranatae A.DC. |
| Begonia novoguineensis Merr. & L.M.Perry |
| Begonia nubicola L.B.Sm. & B.G.Schub. |
| Begonia nuda Irmsch. |
| Begonia nummulariifolia Putz. |
| Begonia nurii Irmsch. |
| Begonia nuwakotensis S.Rajbh. |
| Begonia nyassensis Irmsch. |
| Begonia nymphaeifolia T.T.Yu |
| Begonia oaxacana A.DC. |
| Begonia oblanceolata Rusby |
 |
 |
| Begonia obliqua L. |
| Begonia obliquifolia S.H.Huang & Y.M.Shui |
| Begonia oblongata Merr. |
| Begonia oblongifolia Stapf |
| Begonia obovatistipula C.DC. |
| Begonia obovoidea Craib |
| Begonia obscura Brade |
| Begonia obsolescens Irmsch. |
| Begonia obtecticaulis Irmsch. |
| Begonia obtusifolia Merr. |
| Begonia obversa C.B.Clarke |
| Begonia occhionii Brade |
| Begonia octopetala L'Hér. |
| Begonia odeteiantha Handro |
| Begonia oellgaardii L.B.Sm. & Wassh. |
| Begonia olbia Kerch. |
| Begonia oligandra Merr. & L.M.Perry |
| Begonia oligantha Merr. |
| Begonia oligophylla Blume ex Miq. |
| Begonia oliveri L.B.Sm. & B.G.Schub. |
| Begonia olsoniae L.B.Sm. & B.G.Schub. |
| Begonia ophiogyna L.B.Sm. & B.G.Schub. |
| Begonia opuliflora Putz. |
| Begonia orbiculata Jack |
| Begonia orchidiflora Griff. |
| Begonia oreodoxa Chun & F.Chun |
| Begonia oreophila Kiew |
| Begonia organensis Brade |
| Begonia ornithocarpa Standl. |
| Begonia ornithophylla Irmsch. |
| Begonia otophora Merr. & L.M.Perry |
| Begonia otophylla L.B.Sm. & B.G.Schub. |
| Begonia ovatifolia A.DC. |
| Begonia oxyanthera Warb. |
| Begonia oxyloba Welw. ex Hook.f. |
| Begonia oxysperma A.DC. |
| Begonia oxyura Merr. & L.M.Perry |
| Begonia ozotothrix D.C.Thomas |
| Begonia pachyrhachis L.B.Sm. & Wassh. |
| Begonia padangensis Irmsch. |
| Begonia palawanensis Merr. |
| Begonia paleacea Kurz |
| Begonia paleata A.DC. |
| Begonia palmata D.Don |
| Begonia palmeri S.Watson |
| Begonia panayensis Merr. |
| Begonia panchtharensis S.Rajbh. |
| Begonia paniculata Parodi |
| Begonia pantherina Putz. ex Linden |
| Begonia paoana Kiew & S.Julia |
| Begonia papuana Warb. |
| Begonia papyraptera Sands |
| Begonia paraguayensis Parodi |
| Begonia paranaensis Brade |
| Begonia parcifolia C.DC. |
 |
Begonia parilis Irmsch.
|
| Begonia parishii C.B.Clarke |
| Begonia parodiana L.B.Sm. & B.G.Schub. |
| Begonia parva Merr. |
| Begonia parviflora Poepp. & Endl. |
 |
| Begonia parvifolia Schott |
| Begonia parvilimba Merr. |
| Begonia parvistipulata Irmsch. |
| Begonia parvula H.Lév. & Vaniot |
| Begonia parvuliflora A.DC. |
| Begonia parvuliflora var. parvuliflora |
| Begonia parvuliflora var. pubescens A.DC. |
| Begonia pasamanensis M.Hughes |
| Begonia pastoensis A.DC. |
| Begonia paucilobata C.Y.Wu |
| Begonia paucilobata var. maguanensis (S.H.Huang & Y.M.Shui) T.C.Ku |
| Begonia paulensis A.DC. |
 |
| Begonia paupercula King |
| Begonia pavonina Ridl. |
| Begonia payung S.Julia & Kiew |
| Begonia pearcei Hook.f. |
| Begonia pectennervia L.B.Sm. & Wassh. |
| Begonia pedata Liebm. |
| Begonia pedatifida H.Lév. |
| Begonia pediophylla Merr. & L.M.Perry |
| Begonia pedunculosa Wall. |
| Begonia peekelii Irmsch. |
| Begonia peii C.Y.Wu |
| Begonia pelargoniiflora J.J.de Wilde & J.C.Arends |
| Begonia peltata Otto & Dietr. |
| Begonia peltatifolia Li |
| Begonia peltifolia Schott |
| Begonia peltigera Irmsch. |
| Begonia pendula Ridl. |
| Begonia pengii S.M.Ku & Yan Liu |
| Begonia pennellii L.B.Sm. & B.G.Schub. |
| Begonia penrissenensis Kiew & S.Julia |
| Begonia pensilis L.B.Sm. & Wassh. |
| Begonia pentaphragmifolia Ridl. |
| Begonia pentaphylla Walp. |
| Begonia peperomioides Hook.f. |
| Begonia per-dusenii Brade |
| Begonia perakensis King |
| Begonia peristegia Stapf |
| Begonia pernambucensis Brade |
| Begonia perpusilla A.DC. |
| Begonia perrieri Bois |
| Begonia perryae L.B.Sm. & Wassh. |
| Begonia peruibensis Handro |
| Begonia peruviana A.DC. |
| Begonia petasitifolia Brade |
| Begonia phamiana Kiew |
| Begonia philodendroides Ziesenh. |
| Begonia phoeniogramma Ridl. |
| Begonia phrixophylla Blatt. & McCann |
| Begonia phuthoensis H.Q.Nguyen |
| Begonia phyllomaniaca Mart. |
| Begonia physandra Merr. & L.M.Perry |
| Begonia pickelii Irmsch. |
| Begonia picta Sm. |
| Begonia picturata Yan Liu, S.M.Ku & C.I Peng |
| Begonia pierrei Gagnep. |
| Begonia pilgeriana Irmsch. |
| Begonia pilosa Jack |
| Begonia pilosella Irmsch. |
| Begonia pinetorum A.DC. |
| Begonia pinglinensis C.I Peng |
| Begonia pinheironis L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia pinnatifida Merr. & L.M.Perry |
| Begonia piresiana Handro |
| Begonia piring Kiew & S.Julia |
| Begonia piurensis L.B.Sm. & B.G.Schub. |
| Begonia plantaginea L.B.Sm. & B.G.Schub. |
| Begonia platanifolia Schott |
| Begonia platycarpa Y.M.Shui & W.H.Chen |
| Begonia platyphylla Merr. |
| Begonia platyptera Urb. |
| Begonia plebeja Liebm. |
| Begonia pleioclada Irmsch. |
| Begonia pleiopetala A.DC. |
| Begonia plumieri Kunth |
| Begonia plumieri var. barahonensis O.E.Schulz |
| Begonia pluvialis L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia poculifera Hook.f. |
| Begonia poilanei Kiew |
| Begonia polilloensis Tebbitt |
| Begonia polyandra Irmsch. |
| Begonia polygonata Liebm. |
| Begonia polygonifolia A.DC. |
| Begonia polygonoides Hook.f. |
 |
| Begonia polypetala A.DC. |
| Begonia polytricha C.Y.Wu |
| Begonia popenoei Standl. |
 |
| Begonia porteana Van Geert |
| Begonia porteri H.Lév. & Vaniot |
| Begonia portillana S.Watson |
| Begonia postarii Kiew |
| Begonia potamophila Gilg |
| Begonia praerupta Irmsch. |
| Begonia praetermissa Kiew |
| Begonia preussii Warb. |
| Begonia prieurii A.DC. |
| Begonia princeae Gilg |
| Begonia princeps (Klotzsch) A.DC. |
| Begonia pringlei S.Watson |
| Begonia prionophylla Irmsch. |
| Begonia prionota D.C.Thomas & Ardi |
| Begonia prismatocarpa Hook. |
| Begonia prismatocarpa subsp. petraea (A.Chev.) Sosef |
| Begonia procridifolia Wall. ex A.DC. |
| Begonia prolifera A.DC. |
| Begonia prolixa Craib |
| Begonia promethea Ridl. |
| Begonia propinqua Ridl. |
| Begonia pruinata (Klotzsch) A.DC. |
 |
| Begonia pryeriana Ridl. |
| Begonia pseudodaxinensis S.M.Ku, Yan Liu & C.I Peng |
| Begonia pseudodaedalea P.D.McMillan & Rekha Morris |
| Begonia pseudodryadis C.Y.Wu |
| Begonia pseudoglauca Irmsch. |
| Begonia pseudolateralis Warb. |
| Begonia pseudoleprosa C.I Peng, Yan Liu & S.M.Ku |
| Begonia pseudolubbersii Brade |
| Begonia pseudomuricata Girm. |
| Begonia pseudoviola Gilg |
| Begonia psilophylla Irmsch. |
| Begonia pteridiformis Phutthai |
| Begonia pubescens Ridl. |
| Begonia pudica L.B.Sm. & B.G.Schub. |
| Begonia pulchella Raddi |
| Begonia pulcherrima Sosef |
| Begonia pulchra (Ridl.) L.L.Forrest & Hollingsw. |
| Begonia pululahuana C.DC. |
| Begonia pulvinifera C.I Peng & Yan Liu |
| Begonia pumila Craib |
| Begonia pumilio Irmsch. |
| Begonia punbatuensis Kiew |
| Begonia punchak Kiew & S.Julia |
| Begonia purdieana A.DC. |
| Begonia purpureofolia S.H.Huang & Y.M.Shui |
| Begonia purpusii Houghton ex Ziesenh. |
| Begonia puspitae Ardi |
| Begonia pustulata Liebm. |
 |
| Begonia puttii Craib |
| Begonia pycnantha Urb. & Ekman |
| Begonia pygmaea Irmsch. |
| Begonia pyrrha Ridl. |
| Begonia quadrialata Warb. |
 |
| Begonia quadrialata subsp. dusenii (Warb.) Sosef |
| Begonia quadrialata subsp. quadrialata |
| Begonia quaternata L.B.Sm. & B.G.Schub. |
| Begonia quercifolia A.DC. |
| Begonia rabilii Craib |
| Begonia racemiflora Ortgies ex C.Chev. |
| Begonia racemosa Jack |
| Begonia rachmatii Tebbitt |
| Begonia radicans Vell. |
 |
| Begonia rafael-torresii Burt-Utley |
| Begonia raimondii Irmsch. |
| Begonia rajah Ridl. |
| Begonia rantemarioensis D.C.Thomas & Ardi |
| Begonia ramentacea Paxton |
| Begonia ramosii Merr. |
| Begonia randiana Merr. & L.M.Perry |
| Begonia ravenii C.I.Peng & Y.K.Chen |
| Begonia razafinjohanyi Aymonin & Bosser |
| Begonia reflexisquamosa C.Y.Wu |
| Begonia reginula Kiew |
| Begonia reichenheimii G.Bartsch, |
| Begonia relicta L.B.Sm. & B.G.Schub. |
| Begonia renifolia Irmsch. |
| Begonia reniformis Dryand. |
 |
| Begonia repens Lam. |
| Begonia repenticaulis Irmsch. |
| Begonia retinervia D.Fang, D.H.Qin & C.I Peng |
| Begonia retusa O.E.Schulz |
| Begonia rex Putz. |
| Begonia rheifolia Irmsch. |
| Begonia rhizocaulis (Klotzsch) A.DC. |
| Begonia rhodantha Ridl. |
| Begonia rhodochaeta S.Julia & Kiew |
| Begonia rhodochlamys L.B.Sm. & B.G.Schub. |
| Begonia rhodophylla C.Y.Wu |
| Begonia rhoephila Ridl. |
| Begonia rhyacophila Kiew |
| Begonia rhynchocarpa Y.M.Shui & W.H.Chen |
| Begonia × ricinifolia A.Dietr. |
 |
| Begonia rieckei Warb. |
| Begonia riedelii A.DC. |
| Begonia rigida (Klotzsch) Regel ex A.DC. |
| Begonia rimarum Craib |
| Begonia riparia Irmsch. |
| Begonia rizalensis Merr. |
| Begonia robinsonii Ridl. |
| Begonia robusta Blume |
| Begonia rockii Irmsch. |
| Begonia roezlii Regel |
| Begonia rongjiangensis T.C.Ku |
| Begonia rosacea Putz. |
| Begonia roseibractea Ziesenh. |
| Begonia rossmanniae A.DC. |
| Begonia rostrata Welw. ex Hook.f. |
| Begonia rotunda Vell. |
| Begonia rotundifolia Lam. |
| Begonia rotundilimba S.H.Huang & Y.M.Shui |
| Begonia roxburghii A.DC. |
| Begonia rubella Buch.-Ham. ex D.Don |
| Begonia rubellina L.H. Bailey |
| Begonia rubida Ridl. |
| Begonia rubiginosipes Irmsch. |
| Begonia rubinea Hong Z.Li & H.Ma |
| Begonia rubiteae M.Hughes |
| Begonia ruboides C.M.Hu |
| Begonia rubricaulis Hook. |
| Begonia rubriflora L.Kollmann |
| Begonia rubrifolia Merr. |
| Begonia rubromarginata Gilg |
| Begonia rubronervata De Wild. |
| Begonia rubropilosa A.DC. |
| Begonia rubropunctata S.H.Huang & Y.M.Shui |
| Begonia rubrotincta L.B.Sm. & B.G.Schub. |
| Begonia rufa Thunb. |
| Begonia rufipila Merr. |
| Begonia rufosericea Toledo |
| Begonia ruhlandiana Irmsch. |
| Begonia rumpiensis Kupicha |
| Begonia rupium Irmsch. |
| Begonia ruschii L.Kollmann |
| Begonia russelliana L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia rutilans (Klotzsch) A.DC. |
| Begonia rwandensis J.C.Arends |
| Begonia sabahensis Kiew & J.H.Tan |
| Begonia salaziensis (Gaudich.) Warb. |
| Begonia salesopolensis S.J.Gomes da Silva & Mamede |
| Begonia salisburyana Irmsch. |
| Begonia salomonensis Merr. & L.M.Perry |
| Begonia samarensis Merr. |
| Begonia sambiranensis Humbert ex Aymonin & Bosser |
| Begonia samhaensis M.Hughes & A.G.Mill. |
| Begonia sandalifolia C.B.Clarke |
| Begonia sandtii Houghton ex Ziesenh. |
| Begonia sanguinea Raddi |
 |
| Begonia sanguineopilosa D.C.Thomas & Ardi |
| Begonia santarosensis Kuntze |
| Begonia santos-limae Brade |
| Begonia sarangica Kiew & S.Julia |
| Begonia sarasinorum Irmsch. |
| Begonia sarawakensis Ridl. |
| Begonia sarcocarpa Ridl. |
| Begonia sarmentacea hort. ex Brilmayer |
| Begonia sarmentosa L.B.Sm. & Wassh. |
| Begonia sartorii Liebm. |
| Begonia satrapis C.B.Clarke |
| Begonia saxicola A.DC. |
| Begonia saxifraga A.DC. |
| Begonia saxifragifolia Craib |
| Begonia scabrida A.DC. |
 |
| Begonia scapigera Hook.f. |
| Begonia schaeferi Engl. |
| Begonia scharffii Hook.f. |
 |
| Begonia schliebenii Irmsch. |
| Begonia schlumbergeriana Lem. |
| Begonia schulziana Urb. & Ekman |
| Begonia sciadiophora L.B.Sm. & B.G.Schub. |
| Begonia sciaphila Gilg ex Engl. |
| Begonia scintillans Dunn |
| Begonia scitifolia Irmsch. |
| Begonia scortechinii King |
| Begonia scottii Tebbitt |
| Begonia scutifolia Hook.f. |
| Begonia scutulum Hook.f. |
| Begonia secunda L.B.Sm. & Wassh. |
| Begonia seemanniana A.DC. |
| Begonia segregata L.B.Sm. & B.G.Schub. |
| Begonia semidigitata Brade |
| Begonia semiovata Liebm. |
| Begonia semiparietalis Yan Liu, S.M.Ku & C.I Peng |
| Begonia serapatensis Kiew & S.Julia |
| Begonia sericoneura Liebm. |
 |
| Begonia serotina A.DC. |
| Begonia serpens Merr. |
| Begonia serranegrae L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia serraticauda Merr. & L.M.Perry |
| Begonia serratipetala Irmsch. |
| Begonia sessilifolia Hook.f. |
| Begonia setifolia Irmsch. |
| Begonia setulosa Bertol. |
| Begonia setulosopeltata C.Y.Wu |
| Begonia seychellensis Hemsl. |
| Begonia sharpeana F.Muell. |
| Begonia siamensis Gagnep. |
| Begonia sibthorpioides Ridl. |
| Begonia sibutensis Sands |
| Begonia siccacaudata J.Door. |
| Begonia sikkimensis A.DC. |
| Begonia silhetensis (A.DC.) C.B.Clarke |
| Begonia silletensis (A. DC.) C.B. Clarke |
| Begonia simulans Merr. & L.M.Perry |
| Begonia sinobrevicaulis T.C.Ku |
| Begonia sinofloribunda Dorr |
| Begonia sinovietnamica C.Y.Wu |
| Begonia sinuata Wall. ex Meisn. |
| Begonia sizemoreae Kiew |
| Begonia sleumeri L.B.Sm. & B.G.Schub. |
| Begonia smilacina A.DC. |
| Begonia smithiae Geddes |
| Begonia smithiana T.T.Yu ex Irmsch. |
| Begonia socia Craib |
| Begonia socotrana Hook.f. |
| Begonia sodiroi C.DC. |
| Begonia sogerensis Ridl. |
| Begonia solananthera A.DC. |
 |
| Begonia solimutata L.B.Sm. & Wassh. |
 |
| Begonia solitudinis Brade |
| Begonia soluta Craib |
| Begonia somervillei Hemsl. |
| Begonia sonderiana Irmsch. |
| Begonia soror Irmsch. |
| Begonia sorsogonensis Elmer ex Merr. |
| Begonia sosefiana J.J.de Wilde & Valk. |
| Begonia sousae Burt-Utley |
| Begonia spadiciflora L.B.Sm. & B.G.Schub. |
| Begonia sparreana L.B.Sm. & Wassh. |
| Begonia sparsipila Baker |
| Begonia speluncae Ridl. |
| Begonia sphenocarpa Irmsch. |
| Begonia spilotophylla F.Muell. |
| Begonia spinibarbis Irmsch. |
| Begonia squamipes Irmsch. |
| Begonia squamulosa Hook.f. |
| Begonia squarrosa Liebm. |
| Begonia staudtii Gilg |
| Begonia stellata Sosef |
| Begonia stenocardia L.B.Sm. & B.G.Schub. |
| Begonia stenogyna Sands |
| Begonia stenolepis L.B.Sm. & R.C.Sm. |
| Begonia stenophylla A.DC. |
| Begonia stenotepala L.B.Sm. & B.G.Schub. |
| Begonia stevei M.Hughes |
| Begonia steyermarkii L.B.Sm. & B.G.Schub. |
| Begonia stichochaete K.G.Pearce |
| Begonia stictopoda (Miq.) Miq. ex A.DC. |
| Begonia stigmosa Lindl. |
 |
| Begonia stilandra Merr. & L.M.Perry |
| Begonia stipulacea Willd. |
| Begonia stolzii Irmsch. |
| Begonia strachwitzii Warb. ex Irmsch. |
| Begonia strictinervis Irmsch. |
| Begonia strictipetiolaris Irmsch. |
| Begonia strigillosa A.Dietr. |
| Begonia strigosa (Warb.) L.L.Forrest & Hollingsw. |
| Begonia strigulosa (Hassk.) A.DC. |
| Begonia subacida Irmsch. |
 |
| Begonia subalpestris A.Chev. |
| Begonia subcaudata Rusby ex L.B.Sm. & Schub. |
| Begonia subciliata A.DC. |
| Begonia subcoriacea C.I. Peng, Y. Liu, S.M. Ku |
| Begonia subcostata Rusby |
| Begonia subcyclophylla Irmsch. |
| Begonia subelliptica Merr. & L.M.Perry |
| Begonia subhowii S.H.Huang |
| Begonia subisensis K.G.Pearce |
| Begonia sublobata Jack |
| Begonia sublongipes Y.M.Shui |
| Begonia subnummularifolia Merr. |
| Begonia suboblata D.Fang & D.H.Qin |
| Begonia suborbiculata Merr. |
| Begonia subpeltata Wight |
| Begonia subperfoliata Parish ex Kurz |
| Begonia subprostrata Merr. |
| Begonia subscutata De Wild. |
| Begonia subspinulosa Irmsch. |
| Begonia subtruncata Merr. |
| Begonia subvillosa Klotzsch |
 |
| Begonia subviridis Craib |
| Begonia sudjanae C.-A.Jansson |
 |
| Begonia suffrutescens Merr. & L.M.Perry |
| Begonia summoglabra T.T.Yu |
| Begonia sunorchis C.Chev. |
| Begonia suprafastigiata Irmsch. |
| Begonia surculigera Kurz |
| Begonia susaniae Sosef |
| Begonia sutherlandii Hook.f. |
| Begonia sychnantha L.B.Sm. & Wassh. |
| Begonia sylvatica A.DC. |
| Begonia symbeccarii L.L.Forrest & Hollingsw. |
| Begonia symbracteosa L.L.Forrest & Hollingsw. |
| Begonia symgeraniifolia L.L.Forrest & Hollingsw. |
| Begonia symhirta L.L.Forrest & Hollingsw. |
| Begonia sympapuana L.L.Forrest & Hollingsw. |
| Begonia symparvifolia L.L.Forrest & Hollingsw. |
| Begonia sympodialis Irmsch. |
| Begonia symsanguinea L.L.Forrest & Hollingsw. |
| Begonia tacana Ziesenh. |
| Begonia tafaensis Merr. & L.M.Perry |
| Begonia tafiensis Lillo |
| Begonia × taipeiensis C.I.Peng |
| Begonia taiwaniana Hayata |
| Begonia taliensis Gagnep. |
| Begonia taligera S.Rajbh. |
| Begonia tambelanensis (Irmsch.) Kiew |
| Begonia tampinica Burkill ex Irmsch. |
| Begonia tanala Humbert |
| Begonia tapatia Burt-Utley & McVaugh |
| Begonia tarokoensis M.J.Lai |
| Begonia tatoniana R.Wilczek |
| Begonia tawaensis Merr. |
| Begonia tayabensis Merr. |
| Begonia tayloriana Irmsch. |
| Begonia temburongensis Sands |
| Begonia tenera Dryand. |
| Begonia tenericaulis Ridl. |
| Begonia tengchiana C.I Peng & Y.K.Chen |
| Begonia tenuicaulis A.DC. |
| Begonia tenuifolia Dryand. |
| Begonia tessaricarpa C.B.Clarke |
| Begonia tetralobata Y.M.Shui |
| Begonia tetrandra Irmsch. |
| Begonia teuscheri Linden ex André |
| Begonia teysmanniana (Miq.) Miq. ex B.D.Jacks. |
| Begonia thaspingensis King |
| Begonia thelmae L.B.Sm. & Wassh. |
 |
| Begonia thiemei C.DC. ex Donn.Sm. |
| Begonia thomeana C.DC. |
| Begonia thomsonii A.DC. |
| Begonia thyrsoidea Irmsch. |
| Begonia tigrina Kiew |
| Begonia tiliifolia C.DC. |
| Begonia timorensis (Miq.) Golding & Kareg. |
| Begonia tiomanensis Ridl. |
| Begonia toledana L.B.Sm. & B.G.Schub. |
| Begonia toledoana Handro |
| Begonia tomentosa Schott |
| Begonia tominana Golding |
| Begonia tonduzii C.DC. ex T.Durand & Pittier |
| Begonia tonkinensis Gagnep. |
| Begonia torajana D.C.Thomas & Ardi |
| Begonia torricellensis Warb. |
| Begonia trianae (A.DC.) Warb. |
| Begonia tribenensis C.R.Rao |
| Begonia tribracteata Irmsch. |
| Begonia trichocarpa Dalzell |
| Begonia trichochila Warb. |
| Begonia trichopoda (Miq.) Miq. |
| Begonia trichosepala C.DC. ex Donn.Sm. |
| Begonia tricuspidata C.B.Clarke |
| Begonia trigonocarpa Ridl. |
| Begonia triradiata C.B.Clarke |
| Begonia triramosa Irmsch. |
| Begonia trispathulata (A.DC.) Warb. |
| Begonia tropaeolifolia A.DC. |
| Begonia trujillensis L.B.Sm. |
| Begonia trullifolia Guillaumin |
| Begonia truncatiloba Irmsch. |
| Begonia truncicola Sodiro ex C.DC. |
| Begonia tsaii Irmsch. |
| Begonia tsaratananensis Aymonin & Bosser |
| Begonia tsimihety Humbert |
| Begonia tsoongii C.Y.Wu |
| Begonia tuberculosa Girm. |
| Begonia tumbezensis Irmsch. |
| Begonia turbinata Ridl. |
| Begonia turrialbae Burt-Utley & Utley |
| Begonia udisilvestris C.DC. |
 |
Begonia ulmifolia Willd.
|
| Begonia umbellata Kunth |
| Begonia umbraculifera Hook.f. |
| Begonia umbraculifolia Y.Wan & B.N.Chang |
| Begonia unduavensis Rusby |
| Begonia undulata Schott |
 |
| Begonia uniflora S.Watson |
| Begonia unilateralia Rusby |
| Begonia urdanetensis Elmer |
| Begonia urophylla Hook. |
| Begonia ursina L.B.Sm. & B.G.Schub. |
| Begonia urticae L.f. |
| Begonia uruapensis Sessé & Moç. |
| Begonia urunensis Kiew |
| Begonia vaccinioides Sands |
| Begonia vagans Craib |
| Begonia valdensium A.DC. |
 |
Begonia valida Goebel
|
| Begonia vallicola Kiew |
| Begonia valvata L.B.Sm. & B.G.Schub. |
| Begonia vanderckhovenii De Wild. |
| Begonia vandewateri Ridl. |
| Begonia vanoverberghii Merr. |
| Begonia vareschii Irmsch. |
| Begonia variabilis Ridl. |
| Begonia variegata Y.M.Shui & W.H.Chen |
| Begonia variifolia Y.M.Shui & W.H.Chen |
| Begonia varipeltata D.C.Thomas |
| Begonia varistyle Irmsch. |
| Begonia veitchii Hook.f. |
 |
| Begonia velata L.B.Sm. & B.G.Schub. |
| Begonia velloziana Walp. |
| Begonia venosa Skan ex Hook.f. |
 |
| Begonia venusta King |
| Begonia verecunda M.Hughes |
| Begonia vermeulenii D.C.Thomas |
| Begonia verruculosa L.B.Sm. |
| Begonia versicolor Irmsch. |
| Begonia vestita C.DC. |
| Begonia vicina Irmsch. |
| Begonia vietnamensis H.Q.Nguyen & C.I Peng |
| Begonia villifolia Irmsch. |
| Begonia vincentina O.E.Schulz |
| Begonia violifolia A.DC. |
| Begonia viridiflora A.DC. |
| Begonia viscida Ziesenh. |
| Begonia vitiensis A.C.Sm. |
| Begonia vittariifolia N.Hallé |
| Begonia wadei Merr. & Quisumb. |
| Begonia wageneriana (Klotzsch) Hook. |
| Begonia wakefieldii Gilg ex Engl. |
| Begonia wallichiana Lehm. |
| Begonia walteriana Irmsch. |
| Begonia wangii T.T.Yu |
| Begonia warburgii K.Schum. & Lauterb. |
| Begonia wariana Irmsch. |
| Begonia wattii C.B.Clarke |
| Begonia watuwilensis Girm. |
| Begonia weberbaueri Irmsch. |
| Begonia weberi Merr. |
| Begonia weberlingii Irmsch. ex Weberling |
| Begonia weddeliana A.DC. |
| Begonia weigallii Hemsl. |
| Begonia wengeri C.E.C.Fisch. |
| Begonia wenshanensis C.M.Hu |
| Begonia wilkiei Coyle |
| Begonia wilksii Sosef |
| Begonia wilsonii Gagnep. |
| Begonia windischii L.B.Sm. ex S.F.Sm. & Wassh. |
| Begonia wollastonii Baker f. |
| Begonia wollnyi Herzog |
| Begonia woodii Merr. |
| Begonia wrayi Hemsl. |
 |
Begonia wrightiana A.DC.
|
| Begonia wurdackii L.B.Sm. & B.G.Schub. |
| Begonia wutaiana C.I Peng & Y.K.Chen |
| Begonia wyepingiana Kiew |
| Begonia xanthina Hook. |
| Begonia xerophyta L.B.Sm. & Wassh. |
| Begonia xilitlensis Burt-Utley |
| Begonia xinyiensis T.C.Ku |
| Begonia xiphophylla Irmsch. |
| Begonia xishuiensis T.C.Ku |
| Begonia xylopoda L.B.Sm. & B.G.Schub. |
| Begonia yappii Ridl. |
| Begonia yingjiangensis S.H.Huang |
| Begonia yishanensis T.C.Ku |
| Begonia ynesiae L.B.Sm. & Wassh. |
| Begonia yui Irmsch. |
| Begonia yunckeri Standl. |
| Begonia zairensis Sosef |
| Begonia zamboangensis Merr. |
| Begonia zenkeriana L.B.Sm. & Wassh. |
| Begonia zhangii D.Fang & D.H.Qin |
| Begonia zhengyiana Y.M.Shui |
| Begonia zimmermannii Peter ex Irmsch. |
| Begonia zollingeriana (Klotzsch) A.DC. |