Begonia augustinei Hemsley, 1900

Ding, Hong-Bo, Maw, Mya Bhone, Yang, Bin, Bouamanivong, Somsanith & Tan, Yun-Hong, 2020, An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records, PhytoKeys 138, pp. 187-201 : 187

Begonia augustinei Hemsley Figure 3 A-E

Begonia augustinei Hemsley, Gard. Chron 3 (28): 286. 1900; T.C. Ku in T.L. Wu (ed.), Fl. Reipubl. Popularis Sin. 52(1): 256. 1999; S.H. Huang & Y.M. Shui in C.Y. Wu (ed.), Fl Yunnan. 12: 213. 2006; T.C. Ku et al. in C.Y. Wu & P.H. Raven (eds), Fl. China 13: 163. 2007. Type: China, Yunnan Province, Simao, A. Henry 12333A (holotype: B100365120!).

Specimens examined.

Laos. Luang Namtha Province, Nam Ha National Biodiversity Conservation Area, Near Nalan Neua Village, 20°49'54.92"N, 101°19'24.85"E. 646 m elev., 13 October 2018, Y.H. Tan, B. Yang, H.B. Ding & X.D. Zeng L0687 (HITBC; HNL); Oudomxay Province, Maung Xai, Phou Hin Phee National Biodiversity Conservation Area, 20°43'30.86"N, 102°08'42.39"E. 1288 m elev., 25 October 2018, Y.H. Tan & H.B. Ding L0819 (HITBC; HNL); Oudomxay Province, Maung Xai, Phou Hin Phee National Biodiversity Conservation Area, 20°43'23.74"N, 102°08'42.84"E. 1224 m elev., 25 October 2018, Y.H. Tan & H.B. Ding L0822 (HITBC).

Distribution.

China, Laos.

Note. This species is characterised by elongate rhizomes, extremely asymmetric leaves, base cordate to deeply cordate, margin irregularly serrulate ( Hemsley 1900; Ku 1999; Huang and Shui 2006; Ku et al. 2007).

Figures

Figure 3. A-E Begonia augustinei Hemsley: A habitat B staminate flowers (front view) C leaf blade (adaxially and abaxially) D pistillate flowers E cross section of ovary F-K Begonia dryadis Irmscher: F habitat G staminate flowers (front view) H pistillate flower (front view) I pistillate flower (lateral view) J fruit K cross section of ovary. Photographed by H. B. Ding.