Checklist of Sulawesi Begonia

65 currently accepted indigenous species [11/01/2024]

2 introduced and naturalized species: Begonia cucullata, B. hirtella

Begonia aptera Blume, Enum. Pl. Javae 1: 97. 1827. Sect. Platycentrum

≡Diploclinium apterum (Blume) Miq., Fl. Ned. Ind. 1(1): 691. 1856

Lectotype (designated by Hughes, 2008): Indonesia, Sulawesi: Tondano, Anon. s.n. (L Herb. Lugd. Bat. 898194-39).

=Begonia renifolia Irmsch., Bot. Jahrb. Syst. 50(4): 379. 1913

Holotype: Indonesia, Sulawesi: Minahassa: Bojong, Wallich, N. 15188 (B).

=Begonia cristata Warb. ex L.B.Sm. & Wassh. in Phytologia 52(7): 442. 1983

Lectotype (designated by Smith & Wasshausen, 1983): Indonesia, Sulawesi: Minahassa: Tomohon, 4.1894, Sarasin, K.F. & Sarasin, P.B. 288 (K).

–‘Begonia cristata Warb. ex Koord.’, Nutuurw. Tijdschr. Ned.-Indie 63: 90. 1904, nom. nud.

=Begonia aptera subsp. hirtissima Girm. & D.C.Thomas, Reinwardtia 13(1): 72. 2009

Holotype: Indonesia, Sulawesi: Sulawesi Tenggara Sultra: Gunung Mekongga, 21.3.2006, Girmansyah, D. 654 (BO).

Isotype: E.

Begonia balgooyi D.C.Thomas & Ardi, Gard. Bull. Singapore 70(1): 164. 2018. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Tenggara, Kolaka District, Mangolo Forest Reserve, alt. 68 m, 3.2.2017, Ardi, W.H. 133 (BO).

Isotypes: KRB, SING.

Begonia batusangiensis Ardi & Thomas, Edinburgh J. Bot 80(Article 1980): 4. 2023. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi, Gunung Batusangia, 25 vi 2022, W.H. Ardi WI767 (FIPIA).

Isotypes: CEB, SING.

Begonia bonthainensis Hemsl., Bull. Misc. Inform. Kew: 37. 1896. Sect. Petermannia

Holotype: Indonesia, Sulawesi, South Sulawesi, Bonthain Peak, alt. 2134 m, 10.1894, Everett, A.H. 34 (K).

=Begonia grandipetala Irmsch., Bot. Jahrb. Syst. 50(4): 377. 1913

Holotype: Indonesia, Sulawesi: Bowonglangi, 24.4.1902, Sarasin, K.F. & Sarasin, P.B. 2154 (B).

Begonia capituliformis Irmsch., Bot. Jahrb. Syst. 50(4): 354. 1913. Sect. Petermannia

Holotype: Indonesia [Sulawesi, North Sulawesi], Minahassa, Bojong, Warburg, O. 15190 (B).

Begonia carnosa Teijsm. & Binn., Epim. Lugd. Bat.: 4. 1863. Sect. Petermannia

Putative type material: Indonesia, Sulawesi: Menado: Kapateran, Teijsmann, J.E. s.n. (K).

=Begonia heteroclinis Miq. ex Koord. in Meded. Lands Plantentuin 19: 484. 1898.

Putative type material: Indonesia, Sulawesi: Sulawesi, 1859, de Vriese, W.H. & Teijsmann, J.E. s.n. (L).

Begonia celebica Irmsch., Bot. Jahrb. Syst. 50(4): 343. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Poanaa Range (Bohaa on specimen label), alt. 1500 m, 22.9.1902, Sarasin, K.F. & Sarasin, P.B. 2069 (B).

Begonia chiasmogyna M.Hughes, Edinburgh J. Bot. 63(2-3): 193. 2006. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Gorantalo: Gunung Boliohutu, 0°52'59.998"N, 122°30'E, 23.4.2002, Mendum, M., Atkins, H.J., Newman, M., Hendrian & Sofyan, A. 167 (E).

Begonia comestibilis D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 226. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Katemujotup waterfall, alt. 1030 m, 5°16'30.9"S, 119°51'53.7"E, strongly disturbed forest at margin of coffee plantation, 11.4.2009, Thomas, D.C. & Ardi, W.H. 09-62 (E).

Isotypes: BO, L.

Begonia cucullata Willd., Sp. Pl. 4: 414. 1805. Sect. Ephemera [Introduced, naturalized]

Type: Habitat in Brasilia, s. coll., s.n. (type B-W 17567).

Begonia cuneatifolia Irmsch., Bot. Jahrb. Syst. 50(4): 370. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Northern Sulawesi, Minahassa, Tomohon, 19.6.1894, Sarasin, K.F. & Sarasin, P.B. 494 (B).

Isotype: K

Begonia didyma D.C.Thomas & Ardi, Edinburgh J. Bot. 66(2): 230. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi,Sulawesi Selatan, Latimojong, Palopo, Rantebala (cultivated at Bali Botanic Garden from living material collected in the wild), 16.5.2008, Thomas, D.C. & Ardi, W.H. 08-77 (E).

Isotype: BO.

 Begonia enoplocampa D.C.Thomas & Ardi, Phytotaxa 437(2): 81. 2020. Sect. Jackia

Holotype: Indonesia, Sulawesi, South Sulawesi, Selayar Regency, Selayar Island, Teko Village, 318 m, 21 November 2018, W.H. Ardi 368 (BO).

Isotypes: KRB, SING.

 Begonia flacca Irmsch., Webbia 9: 486. 1954. Sect. Petermannia

Lectotype (designated by Ardi et al., 2018): Indonesia, Sulawesi: South East Sulawesi: Kendari: Peninsula SE of Kendari, 1874, Beccari, O. 4501A (FI).

Begonia gambutensis Ardi & D.C.Thomas, Edinburgh J. Bot. 71(2): 260. 2014. Sect. Petermannia

Holotype: Indonesia, Cultivated in Bali Botanic Garden from vegetative material collected in the wild (Indonesia, Sulawesi, Gorontalo, Bone Bolango district, Suwawa Timur subdistrict, Gunung Gambuta, Desa Pinogu, side of river), alt. 700 m, 3.9.2013, Thomas, D.C. & Ardi, W.H. 13-802 (BO).

Isotypes: E, L.

Begonia gemella Warb. ex L.B.Sm. & Wassh., Phytologia 52(7): 443. 1983. Sect. Petermannia

Lectotype (designated by Smith & Wasshausen, 1983): Indonesia, Sulawesi: Minahassa, Koorders, S.H. 16243B (K).

Isolectotype: (B).

–‘Begonia gemella Warb. ex Koord.’ in Natuurw. Tijdschr. Ned.-Indië 63: 91. 1904, nom. nud.

Begonia guttapila D.C.Thomas & Ardi, Edinburgh J. Bot. 66(2): 234. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Latimojong, Palopo, Rantebala (cultivated at Bali Botanic Garden from living material collected in the wild), 3°21'33"S, 120°7'33"E, 16.5.2008, Thomas, D.C. & Ardi, W.H. 08-81 (E).

Isotype: BO.

Begonia hekensis D.C.Thomas, Edinburgh J. Bot. 66(1): 110. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi,Sulawesi Tengah, Gunung Hek, alt. 1009 m, 1°1'43.32"S, 122°11'32.82"E, riverbank near waterfall, WP17, 12.4.2008, Thomas, D.C. & Ardi, W.H. 08-43 (E).

Isotypes: BO, CEB.

Begonia hirtella Link, Enum. Hort. Berol. Alt. 2: 396. 1822. Sect. Ephemera [Introduced, naturalized]

Type: Brazilia, Sellow F. 2192 (neotype B [B100243031], designated by Kollmann [2020]; isoneotypes B [2 sheets]).

Begonia hispidissima Zipp. ex Koord., Meded. Lands Plantentuin 19: 485. 1898. Sect. Petermannia

Lectotype (designated by Smith & Wasshausen, 1983): Indonesia, Sulawesi: Minahassa, alt. 1250 m, 10.4.1895, Koorders, S.H. 16241B (K).

Isolectotypes: B, BO, L.

Begonia hooveriana Wiriad., Reinwardtia 13(5): 445. 2013. Sect. Petermannia

Holotype: Indonesia, South Sulawesi, Tanah Toraja, Central Park Makele, alt. 900 m, 3°6'15.2"S, 119°51'6.1"E (WGS84), 9.3.1998, Hoover, W.S. 885 (BO).

Begonia humilicaulis Irmsch., Bot. Jahrb. Syst. 50(4): 356. 1914. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Sulawesi, Meyer, A.B. s.n. (B).

Begonia ignita C.W.Lin & C.I Peng, Gard. Bull. Singapore 69(1): 88. 2017. Sect. Petermannia

Holotype: Indonesia, Sulawesi, precise locality unknown, grown in cultivation in Bogor Botanic Gardens, 9.10.2016, Ardi, W.H. 117 (BO).

Isotype: SING

Begonia imperfecta Irmsch., Bot. Jahrb. Syst. 50(4): 367. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Bada, alt. 1400 m, Sarasin, K.F. & Sarasin, P.B. 2126 (B).

Begonia incudiformicarpa Ardi & D.C.Thomas, Phytotaxa 381(1): 34. 2018. Sect. Jackia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi: Buton Island, Kakenauwe Village, 8.2.2017, Ardi, W.H. 147 (BO).

Isotypes: KRB, SING.

Begonia insueta D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 230. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Barat, Kab. Mamuju, Kec. Kaluku, Kp. Popangatalu, Bukit Tabase, alt. 100 m, 8.2.1993, Afriastini, J.J. 2085 (BO).

Begonia insularum Irmsch., Bot. Jahrb. Syst. 50(4): 353. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Sangir Island, Warburg, O. 16107 (B).

Begonia iskandariana Ardi & D.C.Thomas, Phytotaxa 381(1): 37. 2018. Sect. Jackia

Holotype: Indonesia, INDONESIA, Southeast Sulawesi: Wawonii Island, 23 February 2017, Ardi, W.H. 184 (BO).

Isotypes: KRB, SING.

Begonia johntania Ardi & D.C.Thomas, Phytotaxa 381(1): 39. 2018. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi, North Konawe, Linomoyo transmigration village, alt. 94, 3°22'5.998"S, 122°5'24.111"E, 16 February 2017, Ardi, W.H. 163 (BO).

Isotypes: KRB, SING.

Begonia kabaenensis Thomas & Ardi, Edinburgh J. Bot 80(Article 1980): 8. 2023. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi, Gunung Batusangia, 25 vi 2022, W.H. Ardi WI769 (FIPIA).

Isotypes: CEB, SING.

Begonia kinhoi Ardi & D.C.Thomas, Edinburgh J. Bot. 79(Begonia special issue, article 405) 25. 2022. Sect. Petermannia

Holotype:Indonesia, Sulawesi, North Sulawesi, Gunung Klabat, 30 i 2019, W.H. Ardi W.I. 386 (holotype BO).

Isotypes: CEB, FIPIA, SING.

Begonia labengkiensis Ardi & Thomas, Edinburgh J. Bot 80(Article 1980): 11. 2023. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi, Labengki Besar Island, 28 vi 2022, W.H. Ardi WI773 (FIPIA).

Isotypes: CEB, SING.

Begonia lasioura D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 233. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Mankutana-Pendolo divide, alt. 600 m, 2°21'29.1"S, 120°47'42.3"E, 3.5.2009, Thomas, D.C. & Ardi, W.H. 09-110 (E).

Isotypes: BO, L.

Begonia mabberleyana D.C.Thomas & Ardi, Gard. Bull. Singapore 71(Suppl. 2): 218. 2019. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Banggai Regency, Lamala District, Sirom near Boloak village, 0°52'55.9''S, 123°16′46.2''E, 192 m, 12 February 2019, Ardi, W.H. 425 (BO).

Isotypes: KRB, SING.

Begonia macintyreana M.Hughes, Edinburgh J. Bot. 63(2-3): 194. 2006. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Gorantalo: Nr Tulabolo, alt. 177 m, 0°29'38"N, 123°16'22.011"E, 4.4.2002, Mendum, M., Atkins, H.J., Newman, M., Hendrian & Sofyan, A. 2 (E).

Isotypes: A, L.

Begonia masarangensis Irmsch., Bot. Jahrb. Syst. 50(4): 368. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Masarang, 23.4.1894, Sarasin, K.F. & Sarasin, P.B. 269 (B).

Isotype: K.

Begonia mattampensis Ardi & D.C.Thomas, Reinwardtia 18(1): 23. 2019. Sect. Petermannia

Holotype: Indonesia, Sulawesi, South Sulawesi, Pangkadjene, Mattampa cave, 02 November 2018, Wisnu Ardi WI 322 (BO).

Isotypes: FIPIA, KRB, SING.

Begonia matarombeoensis D.C.Thomas & Ardi, Gard. Bull. Singapore 70(1): 168. 2018. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Tenggara, N of Linomoyo, Matarombeo, alt. 2 m, 3°19'34.72"S, 122°5'5.568"E, 14.2.2017, Ardi, W.H. 154 (BO).

Isotype: KRB, SING.

Begonia medicinalis Ardi & D.C.Thomas, Phytotaxa 423(1): 42. 2019. Sect. Petermannia

Holotype: Cultivated at Bogor Botanic Gardens, from material collected in the wild (INDONESIA, Sulawesi, South Sulawesi, East Luwu Regency, Wasuponda, Matabuntu Waterfall, 13 March 2019), Wisnu Handoyo Ardi WI 447 (BO).

Isotypes: CEB, SING.

Begonia mekonggensis Girm. & Wiriad., Reinwardtia 13(1): 70. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Sulawesi Tenggara Sultra: Gunung Mekongga, 18.3.2006, Girmansyah, D. 579 (BO).

Isotype: E.

Begonia mendumiae M.Hughes, Edinburgh J. Bot. 63(2-3): 196. 2006. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Gorantalo: Gunung Ali, alt. 200 m, 0°24'N, 123°22'E, 28.4.2002, Mendum, M., Atkins, H.J., Newman, M., Hendrian & Sofyan, A. 240 (E).

Begonia nobmanniae D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 235. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Barat, Road Polewali to Mamasa, alt. 879 m, 3°18'51.9"S, 119°22'24.5"E, rocky wall at road side, primary forest margin, with B. aptera, 7.5.2009, Thomas, D.C. & Ardi, W.H. 09-123 (E).

Isotypes: BO, L.

Begonia ozotothrix D.C.Thomas, Edinburgh J. Bot. 66(1): 105. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Tengah, Gunung Katopas, alt. 615 m, 1°10'10.74"S, 121°28'24.3"E, on wet rock wall at riverbank, full-shade, 7.5.2008, Thomas, D.C. & Ardi, W.H. 08-67 (E).

Isotypes: BO.

Begonia pitopangii D.C.Thomas & Ardi, Edinburgh J. Bot. 79(Begonia special issue, article 405) 32. 2022. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Donggala Regency, Gunung Sojol, 7 viii 2018, W.H. Ardi WI306 (holotype BO).

Isotypes: FIPIA, SING.

Begonia prionota D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 237. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Gunung Rantemario, alt. 2175 m, 3°24'59"S, 119°59'34.7"E, steep river bank with Impatiens spec., Begonia aptera, Urticaceae, 27.4.2009, Thomas, D.C. & Ardi, W.H. 09-97 (E).

Isotypes: BO, L.

Begonia rachmatii Tebbitt, Edinburgh J. Bot. 61(2-3): 101. 2005. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Gunung Babalombang, 8.1913, Rachmat 475 (L).

Begonia ranoposoensis Saleh, Bandjolu & Ardi, Taiwania 68(2): 180. 2023. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Poso Regency, spread on wet rock wall at Torau Cave, 1°47'58.5"S 120°31'57.2"E, 300–500 m asl, 28 November 2021, Bandjolu K 002 (holotype BO).

Isotype: CEB.

Begonia rantemarioensis D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 240. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Gunung Rantemario, alt. 1978 m, 3°24'32.3"S, 120°0'24.9"E, primary rainforest on steep slope, 24.4.2009, Thomas, D.C. & Ardi, W.H. 09-82 (E).

Isotypes: BO, L.

Begonia rieckei Warb., Bot. Jahrb. Syst. 13(3-4): 387. 1891. Sect. Petermannia

=Begonia pseudolateralis Warb. in Perkins, Frag. Fl. Philipp. 1: 51. 1904

Holotype: Philippines, Luzon, Isabela Province, Malunu, Warburg, O. 11793 (B).

=Begonia peekelii Irmsch., Bot. Jahrb. Syst. 50: 360. 1913

Holotype: Papua New Guinea, New Guinea, Bismarck Archipelago, New Ireland, New Mecklenburg, 21.9.1910, Peekel, G. 644 (B).

=Begonia strictipetiolaris Irmsch., Bot. Jahrb. Syst. 50(4): 348. 1913

Type: Indonesia, Sulawesi: Minahassa: Tomohon, 11.7.1894, Sarasin, K.F. & Sarasin, P.B. 400a (B, K).

=Begonia brachybotrys Merr. & L.M. Perry, J. Arnold Arbor. 24: 56. 1943

Holotype: Indonesia, New Guinea, Idenburg River, 4.1939, Brass, L.J. 14112 (A).

Isotype: Indonesia, New Guinea, Idenburg River, 4.1939, Brass, L.J. 14112 (L).

=Begonia koordersii Warb. ex L.B.Sm. & Wassh., Phytologia 52(7): 444. 1983

Holotype: Indonesia, Sulawesi: Minahassa, 1.3.1895, Koorders, S.H. 16246B (K).

Isotypes: B, BO.

–‘Begonia koordersii Warb.’ in Koorders, Natuurw. Tijdschr. Ned.-Indië 63: 91. 1904, nom. nud.

Begonia robusta Blume, Enum. Pl. Javae 1: 96. 1827. Sect. Platycentrum

≡Platycentrum robustum (Blume) Miq., Fl. Ned. Ind. 1(1): 694. 1856

≡Casparya robusta (Blume) A.DC., Prodr. 15(1): 275. 1864.

Type: not located.

=Begonia splendida K.Koch, Berliner Allg. Gartenzeitung 10: 74. 1857. Type: not located.

=Sphenanthera robusta Hassk. Ex Klotzsch, Bot. Zeitung 15: 182. 1857. Type: not located.

Begonia rolandfadlii Dayanti, Ramadanil & Ardi, Phytotaxa 439(2): 140. 2020. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Gunung Sidole, Aloo Village, 26 December 2018, E.P. Dayanti ED 9 (BO).

Isotype: CEB.

Begonia sanguineopilosa D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 243. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Barat, G. Mambulinin, alt. 1856 m, 2°53'42.5"S, 119°21'37.6"E, logged area at margin of primary rainforest, 11.5.2009, Thomas, D.C. & Ardi, W.H. 09-129 (E).

Isotypes: BO, L.

Begonia sarasinorum Irmsch., Bot. Jahrb. Syst. 50(4): 349. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Bada, alt. 800 m, Sarasin, K.F. & Sarasin, P.B. 2114 (B).

Begonia siccacaudata J.Door., Blumea 45(2): 400. 2000. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Bantimurung Waterfalls, alt. 60 m, Wieringa, J.J. 1902 (WAG).

Isotype: L.

Begonia sidolensis Dayanti, Ramadanil & D.C.Thomas, Phytotaxa 439(2): 137. 2020. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi: Gunung Sidole, Aloo Village, 27 December 2018, E.P. Dayanti ED 12 (BO).

Isotype: CEB.

Begonia siregarii Ardi & D.C.Thomas, Edinburgh J. Bot. 71(2): 263. 2014. Sect. Petermannia

Holotype: Indonesia, Cultivated in Bali Botanic Garden from vegetative material collected in the wild (Indonesia, Sulawesi, South Sulawesi, Tana Toraja, Kete Kesu village, burial site), alt. 800 m, 2°59'53.1"S, 119°54'35.3"E (WGS84), 3.9.2013, Thomas, D.C. & Ardi, W.H. 13-801 (BO).

Isotypes: E, L.

Begonia sojolensis D.C.Thomas & Ardi, Edinburgh J. Bot. 79(Begonia special issue, article 405) 41. 2022. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Central Sulawesi, Donggala Regency, Gunung Sojol, 8 viii 2018, W.H. Ardi WI311 (BO).

Isotypes: FIPIA, SING.

Begonia sphenocarpa Irmsch., Bot. Jahrb. Syst. 50(4): 369. 1913. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Mt. Topapu, alt. 1300 m, 17.9.1902, Sarasin, K.F. & Sarasin, P.B. 2100 (B).

Begonia stevei M.Hughes, Edinburgh J. Bot. 63(2-3): 197. 2006. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Loewoek distr.: Sungai Hek, alt. 660 m, 1°1'10.4"S, 122°10'30.2"E, 25.2.2004, Hendrian, Newman, M., Scott, S., Nazre Saleh, M. & Supriadi, D. 877 (E).

Isotypes: CEB, L

Begonia strachwitzii Warb. ex Irmsch., Bot. Jahrb. Syst. 50(4): 357. 1913. Sect. Petermannia

Type: Indonesia, Sulawesi: Minahassa: Bojong, Warburg, O. 15192 (B [2 sheets]).

Begonia tjiasmantoi Ardi & D.C.Thomas, Reinwardtia 19(1): 61. 2020. Sect. Petermannia

Holotype: Sulawesi, West Sulawesi: Mamasa Regency, Messawa, Seppang, 958 m, S 3.0635556, E 119.3131724, 27 November 2019, W.H. Ardi, M. Ardiyani, W.A. Mustaqim & Slamet WI 614 (BO).

Isotypes: KRB, SING.

Begonia torajana D.C.Thomas & Ardi, Edinburgh J. Bot. 68(2): 246. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Tana Toraja, Gunung Sesean, alt. 1819 m, 2°54'8.9"S, 119°52'40.9"E, at side of small stream, in full shade, with Cyrtandra, Urticaceae, ferns, 1.5.2009, Thomas, D.C. & Ardi, W.H. 09-106 (E).

Isotypes: BO, L.

Begonia tumburanoensis D.C.Thomas & Ardi, Phytotaxa 381(1): 45. 2018. Sect. Jackia

Holotype: Indonesia, Sulawesi, Southeast Sulawesi: Wawonii Island, Tumburano waterfall, alt. 197, 4°3'42.048"S, 123°8'12.516"E, 23 February 2017, Ardi, W.H. 179 (BO).

Isotypes: KRB, SING.

Begonia varipeltata D.C.Thomas, Edinburgh J. Bot. 65(3): 370. 2006. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Tengah, cultivated at RBGE, from seed collected in the wild in Luwuk District, Bunta Subdistrict, Sumber Agung Village, Sungai SPA, alt. 200 m, 0°59'7.56"S, 122°9'17.28"E, 24.9.2007, Thomas, D.C. 07-21 (E).

Isotype: L.

Begonia vermeulenii D.C.Thomas, Edinburgh J. Bot. 68(2): 248. 2011. Sect. Petermannia

Holotype: Indonesia, Sulawesi, Sulawesi Selatan, Buntu area, Kampong Lokkok, alt. 1500 m, 3°13'S, 119°48'E, limestone slope with remnants of primary forest, secondary forest, low scrub, grassland and agricultural land; in disturbed primary forest with dense undergrowth, 15.9.2003, Vermeulen, J.J. 2301 (WAG).

Isotype: SING.

Begonia watuwilensis Girm., Reinwardtia 13(1): 70. 2009. Sect. Petermannia

Holotype: Indonesia, Sulawesi: Sulawesi Tenggara Sultra: Mt. Watuwila, 14.5.2008, Girmansyah, D. 914 (BO).

Isotype: E.

Begonia willemii Ardi, Girm. & D.C.Thomas, Taiwania 66(3): 374. 2021. Sect. Petermannia

Holotype: INDONESIA. Sulawesi, Central Sulawesi, Luwuk Banggai District, Hanga-hanga waterfall, 4 June 2016. Deden Girmansyah Deden 2470 (holotype BO).

Isotype: CEB, E.