Begonia lancangensis S.H. Huang, 1999

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 lancangensis S.H. Huang Figure 4 A-C

Begonia lancangensis S.H. Huang, Acta Bot. Yunnan. 21(1): 13. 1999; S.H. Huang & Y.M. Shui in C.Y. Wu (ed.), Fl Yunnan. 12: 230. 2006; T.C. Ku et al. in C.Y. Wu & P.H. Raven (eds), Fl. China 13: 181. 2007. Type: China, Yunnan Province, Lancang Xian, Fazhan He, 1600 m elev., 1995, Huang Suhua 95001 (holotype: YUNU).

Specimens examined.

Laos. Luang Namtha Province, Nam Ha National Biodiversity Conservation Area, Near Na Lun Village, 20°50'39.62"N, 101°19'41.46"E. 687 m elev., 23 March 2018, Y.H. Tan, B. Yang, H.B. Ding & X.D. Zeng L0055 (HITBC).

Distribution.

China, Laos.

Note.

The species is characterised by its dioecious and erect stems with ovate or ovate-oblong leaves and fleshy berry-like fruits ( Shui and Huang 1999, Ku et al. 2007). Additionally, B. handelii Irmscher ( Irmscher 1921: 24) and B. acetosella Craib ( Craib 1912: 153) have been discovered in the same locality. We suspect that this species may be a natural hybrid species of them.

Figures

Figure 4. A-C Begonia lancangensis S. H. Huang: A habitat B staminate flower (front view) C staminate flower (back view) D-F Begonia sizemoreae Kiew: D habitat E staminate flower F pistillate flower G-I Begonia silletensis (A. DC.) C. B. Clarke subsp. mengyangensis M. C. Tebbitt & K. - Y. Guan: G habitat H inflorescence I staminate flower (front view). Photographed by H. B. Ding and Y. H. Tan.