Table 1 Voucher information for samples used and GenBank accession numbers of cpDNA sequences

Begonia luzhaiensis T.C.Ku

 Bama (BM)

S.-M. Ku 2022 (HAST 142361)

Bana Village, Xishan Township, Bama County, Guangxi, China

24°14′17″N 107°15′50″E

MG063376

 Donglan (DL)

S.-M. Ku 2002 (HAST 142357)

Dawei Village, Donglan Town, Donglan County, Guangxi, China

24°30′33.0″N 107°19′13.0″E

MG063379, MG063380

 Fengshan (FS)

S.-M. Ku 2016 (HAST 142358)

Paoli Township, Fengshan County, Guangxi, China

24°24′14.0″N 107°04′00.0″E

MG063378

 Fuli (FL)

H.-Y. Huang et al. 6 (HAST 142351)

Fuli Town, Yangshuo County, China

24°47′08.2″N, 110°31′22.5″E

MG063293–MG063297

 Gaotian (GT)

K.-F. Chung et al. 1855 (HAST 142364)

Paitou Village, Gaotian Town, Yanshuo County, Guangxi, China

24°44′25.8″N 110°25′04.9″E

MG063369–MG063373

 Lingui (LG)

H.-Y. Huang et al. 31 (HAST 142353)

Sishan Village, Huixian Town, Lingui County, Guangxi, China

25°02′27.9″N 110°11′59.4″E

MG063323–MG063327

 Lingyun (LY)

C.-I Peng et al. 24344 (HAST 138438)

Luolou Town, Lingyun County, Guangxi, China

24°25′48″N, 106°44′24″E

MG063381–MG063415

 Luzhai (LZ)

H.-Y. Huang et al. 18 (HAST 142354)

Zhongdu Town, Luzhai County, Guangxi, China

24°43′37.9″N 109°39′50.6″E

MG063311–MG063322

 Paoli (PL)

S.-M. Ku 2018 (HAST 142359) & 2019 (HAST 142360)

Paoli Township, Fengshan County, Guangxi, China

24°25′43.0″N 107°05′46.0″E

MG063374, MG063375

 Rongshui (RS)

H.-Y. Huang et al. 33 (HAST 142355)

Xidong Scenic Area, Ronshui County, Guangxi, China

25°05′30.2″N 109°12′10.7″E

MG063334–MG063347

 Tian’e (TE)

K.-F. Chung et al. 1825 (HAST 142363)

Dulou Village, Bamu Township, Tian’e County, Guangxi, China

24°52′21.2″N 107°11′31.0″E

MG063366–MG063368

 Xincheng (XC)

H.-Y. Haung et al. 102 (HAST 142356)

Chengguan Town, Xincheng County, Guangxi, China

24°03′49.5″N 108°40′08.9″E

MG063348–MG063365

 Xingping (XP)

K.-F. Chung et al. 3017 (HAST 142365)

Xingping Town, Yangshou County, Guangxi, China

24°54′48.3″N 110°30′02.9″E

MG063416–MG063424

 Yongfu (YF)

C.-I Peng et al. 24374 (HAST 138467)

Luojin Township, Yongfu County, Guangxi, China

25°01′12.0″N 110°09′02.0″E

MG063328–MG063333

 Yangshuo (YS)

H.-Y. Huang et al. 8 (HAST 142352)

Yanshuo Town, Yanshuo County, Guangxi, China

24°46′12.9″N, 110°27′43.4″E

MG063298–MG063310

 Yizhou (YZ)

Y.-M. Shui 9010 (HAST 94959)

Yankou Village, Yizhou District, Guangxi, China

24°29′24.0″N, 108°34′12.0″E

MG063377

Begonia asteropyrifolia Y.M.Shiu & W.H.Chen

 (Outgroup)

C.-I Peng et al. 21062 (HAST 117107)

Donglan Town, Donglan County, Guangxi, China

–

MG063292