The following species are recognised in the genus Begonia:
A
Begonia abbottii Urb. Begonia abbreviata C.I Ping Begonia abdullahpieei Kiew Begonia aberrans Irmsch. Begonia abhak F.A Blasco, Alejandro, Tandang & Rubite Begonia aborensis Dunn Begonia acaulis Merr. & L.M.Perry Begonia acclivis Coyle Begonia acerifolia Kunth Begonia acetosa Vell. Begonia acetosella Craib Begonia acida Vell. Begonia acidulenta S.Julia & Kiew Begonia aconitifolia A.DC. Begonia acuminatissima Merr. Begonia acutifolia Jacq. Begonia acutiloba Liebm. Begonia acutis Y.M.Shui, W.H.Chen &H.Q.Nguyen Begonia acutitepala K.Y.Guan & D.K.Tian Begonia adamsensis Magtoto & Rubite Begonia addrinii S.Julia & Kiew Begonia adenodes Irmsch. Begonia adenopoda Lem. Begonia adenostegia Stapf Begonia adliniana Rimi 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 aguabuenensis Burt-Utley & Utley Begonia aguiabrancensis L.Kollmann Begonia aguilariiJara & Zabala Begonia agusanensis Merr. Begonia ahooensis P.L.Sherpa, A.Pradhan & A.Chettri Begonia aiensis C. W. Lin & C.I Peng Begonia aikrono H.P.Wilson & Jimbo Begonia akaw Mansibang, Aumentado & Y.P.Ang Begonia aketajawensis Ardi & D.C.Thomas Begonia alabensis Kiew Begonia alba Merr. Begonia albidula Brade Begonia albobracteata Ridl. Begonia albococcinea Hook. Begonia albomaculata C.DC. ex Huber Begonia albopunctata Y.M.Shui, W.H.Chen & H.Q.Nguyen Begonia alcarrasica J.Sierra Begonia alchemilloides A.DC. Begonia algaia L.B.Sm. & Wassh. Begonia alice-clarkae Ziesenh. Begonia alicida C.B.Clarke Begonia almedana Burt-Utley & Utley Begonia alnifolia A.DC. Begonia alpina L.B.Sm. & Wassh. Begonia alta Aver. Begonia altimontana E.L.Jacques Begonia altissima Ridl. Begonia altoperuviana A.DC. Begonia alvarezii Merr. Begonia alveolata T.T.Yu Begonia amamampang Mazo & Rubite Begonia ambanizanensis Scherber. & Duruiss. Begonia ambodiforahensis Scherber. & Duruiss. Begonia amidalae C.W. Lin & C.I. Peng Begonia amnicola Y.H.Tan, M.B.Maw & H.B.Ding Begonia amoeboides Moonlight Begonia amparoae F.A.Blasco, Alejandro, Tandang & Rubite 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 angularis Raddi Begonia angulata Vell. Begonia angustibracteata D.K.Tian & R.C.Hu 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 anserina C.W.Lin & C.I Peng Begonia antaisaka Humbert Begonia anthonyi (A.DC.) Warb. Begonia antioquensis Kiew Begonia antongilensis Humbert Begonia antonietae Brade Begonia antsingyensis Humbert ex Aymonin & Bosser Begonia antsiranensis Aymonin & Bosser Begonia apayaoensis Merr. Begonia apiensis Kiew & S.Julia Begonia apparicioi Brade Begonia aptera Blume Begonia aquaticaritata S.S.Ying Begonia arachnoidea C.I Peng, Yan Liu & S.M.Ku Begonia araneumoides Ardi & Girm. Begonia arauensis M.Hughes Begonia arborescens Raddi Begonia archboldiana Merr. & L.M.Perry Begonia areolata Miq. Begonia arfakensis (Gibbs) L.L.Forrest & Hollingsw. Begonia argentea Linden Begonia argenteomarginata Tebbitt Begonia argentii Kiew & S.Julia Begonia aridicaulis Ziesenh. Begonia aristata Blasco, Alejandro, & Rubite Begonia armykapii S.Julia & C.Y.Ling Begonia arnottiana (Wight) A.DC. Begonia arol-lanoensis C.Y.Ling & S.Julia Begonia arrogans Irmsch. Begonia articulata Irmsch. Begonia artior Irmsch. Begonia arunachalensis D.Borah & Wahlsteen Begonia asaroensis J.N.Gagul Begonia asperifolia Irmsch. Begonia aspersa Aver., Nuraliev & Y.M.Shui Begonia aspleniifolia Hook.f. ex A.DC. Begonia assurgens Irmsch. ex Weberling Begonia asteroides L.B.Sm. & B.G.Schub. Begonia asteropyrifolia Y.M.Shui & W.H.Chen Begonia atlantica M.D.Miranda & E.L.Jacques Begonia atricha (Miq.) Miq. ex A.DC. Begonia atrofusca Wahlsteen & D.Borah Begonia atroglandulosa Sosef Begonia augustae Irmsch. Begonia augustinei Hemsl. Begonia aurantiiflora C.I Peng, Yan Liu & S.M.Ku Begonia auriculata Hook.f. Begonia auritalata D.K.Tian & H.J.Wei Begonia auritistipula Y.M.Shui & W.H.Chen Begonia aurora C.I Peng, Yan Liu & W.B.Xu Begonia austroguangxiensis Y.M.Shui & W.H.Chen Begonia austrotaiwanensis Y.K.Chen & C.I.Peng Begonia austrovietnamica C.I Peng, C.W.Lin, D.D.Nguyen & N.D. Truong Begonia austroyunnanensis W.G.Wang, H.C.Xi & J.Y.Shen Begonia awongii Sands Begonia axillaris Ridl. Begonia axillipara Ridl. Begonia azuensis Urb. & Ekman
B
Begonia babeana Aver. & H.Q.Nguyen Begonia baccata Hook.f. Begonia bachmaensis Y.M.Shui & T.T.D.Pham Begonia bachulkarii Aitawade, Kattuk. & S.R.Yadav Begonia bacmeensis V.T.Pham & C.W.Lin Begonia bacsonensis D.K.Tian, T.S.Hoang & B.Chen Begonia bagotiana Humbert ex Aymonin & Bosser Begonia bahakensis Sands Begonia bahiensis A.DC. Begonia baik C.W.Lin & C.I Peng Begonia baikoides S.Julia & C.Y.Ling Begonia baishishanensis R.C.Hu & D.K.Tian Begonia bajik S.Julia & C.Y.Ling Begonia bakunensis S.Julia Begonia balangcodiae Rubite, S.H.Liu & K.F.Chung Begonia balansae C.DC. Begonia balansana Gagnep. Begonia balgooyi D.C.Thomas & Ardi Begonia baliensis Girm. Begonia balmisiana Balmis Begonia bamaensis Yan Liu & C.I Peng Begonia bambusetorum H.Q.Nguyen, Y.M.Shui & W.H.Chen Begonia banaoensis J.Sierra Begonia bangii Kuntze Begonia bangsamoro D.P.Buenavista Begonia barahonensis (O.E.Schulz) Urb. Begonia baramensis Merr. Begonia barbellata Ridl. Begonia barkeri Knowles & Westc. Begonia barkleyana L.B.Sm. Begonia baronii Baker Begonia barosma X.X.Feng, Y.N.Huang & Z.X.Liu Begonia barrigae L.B.Sm. & B.G.Schub. Begonia barsalouxiae Standl. & L.O.Williams Begonia bartlettiana Merr. & L.M.Perry Begonia basintaliana Rimi Begonia bataiensis Kiew Begonia batuphila Girm. Begonia baturongensis Kiew Begonia batusangiensis Ardi & D.C.Thomas Begonia baviensis Gagnep. Begonia bawangensis Girm., Randi & M.Hughes Begonia bayae S.Julia & Kiew Begonia bazhaiensis W.G.Wang & R.K.Li Begonia beccariana Ridl. Begonia beddomei Hook.f. Begonia beijneniiY.P.Ang, Tandang, Rubite & R.A.Bustam. Begonia bekakapensis C.Y.Ling & S.Julia Begonia bekopakensis Aymonin & Bosser Begonia belagaensis S.Julia Begonia bella Phutthai Begonia beludruvenea M.Hughes Begonia benaratensis S.Julia Begonia bengohensis S.Julia Begonia benitotanii Rubite, Tandang & C.W.Lin Begonia bequaertii Robyns & Lawalrée Begonia berhamanii Kiew Begonia beringii Mazo, Salatan & Rubite Begonia bernadusii Guanih Begonia bernicei Aymard & G.A.Romero Begonia bernieri A.DC. Begonia beryllae Ridl. Begonia besleriifolia Schott Begonia bessangpassensis Calaramo, Rubite & C.W.Lin Begonia betancurii Jara & Moonlight Begonia betsimisaraka Humbert Begonia bettinae Ziesenh. Begonia bhutanensis P.Gyeltshen & M.Hughes Begonia bidentata Raddi Begonia biflora T.C.Ku Begonia bifolia Ridl. Begonia bifurcata L.B.Sm. & B.G.Schub. Begonia biguassuensis Brade Begonia bijantiae D.Borah, Taram & M.Hughes Begonia biliranensis Merr. Begonia bimaensis Undaharta & Ardaka Begonia bintang Rimi Begonia binuangensis Merr. Begonia bipinnatifida J.J.Sm. Begonia biserrata Lindl. Begonia bissei J.Sierra Begonia blaan Naive 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 bonii Gagnep. Begonia bonitoensis Brade Begonia bonthainensis Hemsl. Begonia bonus-henricus J.J.de Wilde Begonia boqueronensis Burt-Utley & Utley Begonia boraceiensis Handro Begonia boreoharlingii Moonlight & Tebbitt Begonia borneensis A.DC. Begonia bosseri Keraudren Begonia bosuangiana S.Julia Begonia botryoides Moonlight & Tebbitt 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 bracteolata N.Krishna, Pradeep & B.Mani Begonia bracteosa A.DC. Begonia bradei Irmsch. Begonia brandbygeana L.B.Sm. & Wassh. Begonia brandisiana Kurz Begonia brangbosangensis Girm. 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 brevilobata Irmsch. Begonia brevipedunculata Y.M.Shui Begonia brevipes Merr. Begonia brevipetala (A.DC.) Warb. Begonia brevirimosa Irmsch. Begonia × breviscapa C.I Peng, Yan Liu & S.M.Ku Begonia brevisetulosa C.Y.Wu Begonia bridgesii A.DC. Begonia broussonetiifolia A.DC. Begonia bruneiana Sands Begonia brunneosquamata Phonep. & C.W.Lin Begonia buchtienii Irmsch. Begonia buddleiifolia A.DC. Begonia bufoderma L.B.Sm. & Wassh. Begonia × buimontana Yamam. Begonia bukitrayaensis Randi & Mustaqim Begonia bulbillifera Link & Otto Begonia bullata Urb. & Ekman Begonia bullatifolia L.Kollmann Begonia burabod Rubite, C.Justo, P.Villaseñor & C.W.Lin Begonia burbidgei Stapf Begonia burkillii Dunn Begonia burmensis L.B.Sm. & Wassh. Begonia burttii Kiew & S.Julia Begonia buseyi Burt-Utley Begonia butuanensis Bucay, Tandang & K.F.Chung
C
Begonia cabanillasii Y.P.Ang, Tandang, J.Agcaoili & R.A.Bustam Begonia cacauicola L.B.Sm. ex S.F.Sm. & Wassh. Begonia caespitosa Jack Begonia calcarea Ridl. Begonia calcicola Merr. Begonia calciphila C.I Peng Begonia calderonii Standl. Begonia calliantha Merr. & L.M.Perry Begonia callistemon Tebbitt & P.R.Stevenson Begonia callosa L.Kollmann Begonia calvescens (Brade ex L.B.Sm. & R.C.Sm.) E.L.Jacques & Mamede Begonia calzadae Burt-Utley & Utley Begonia camiguinensis Elmer Begonia campanensis Burt-Utley & Utley Begonia camposportoana Brade Begonia camugao Bucay, Tandang & K.F.Chung Begonia canaliculata Brade Begonia candollei Ziesenh. Begonia cangyuanensis Y.H.Tan & H.B.Ding Begonia caobangensis C.I Peng & C.W.Lin Begonia capanemae Brade Begonia caparaoensis E.L.Jacques & L.Kollmann Begonia capensis L.f. Begonia capillipes Gilg Begonia capituliformis Irmsch. Begonia caraguatatubensis Rubite, R.R., M. Irabagon, D. Palacio, Y.P.Ang, & R.Bustam. Begonia caramoanensis 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 carolineifolia Regel Begonia carpinifolia Liebm. Begonia carrieae Ziesenh. Begonia caryotarum Y.M.Shui & W.H.Chen Begonia casiguranensis Quisumb. & Merr. Begonia castaneifolia Otto & Dietr. Begonia casseabri Y.H.Tan, M.B.Maw & H.B.Ding Begonia castilloi Merr. Begonia castrosouzae L.Kollmann Begonia cataracta Souvann., Lanors. & Lamxay Begonia catbensis L.N.Dong, K.S.Nguyen & Y.M.Shui 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 celata S.Julia & Kiew Begonia celebica Irmsch. Begonia ceratocarpa S.H.Huang & Y.M.Shui Begonia chaiana Kiew & S.Julia Begonia chakensis S.Julia & C.Y.Ling Begonia chambersiae W.N.Takeuchi Begonia charlesjarosiana L.Kollmann Begonia chemillenensis Moonlight Begonia chiapensis Burt-Utley Begonia chiasmogyna M.Hughes Begonia chindwinensis Y.H.Tan, M.B.Maw & H.B.Ding Begonia chingguoliaoensis S.S.Ying Begonia chingii Irmsch.