Begonia silletensis subsp. mengyangensis M.C. Tebbitt & K.Y. Guan

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 silletensis subsp. mengyangensis M.C. Tebbitt & K.Y. Guan Figure 4 G-I

Begonia silletensis (A. DC.) C.B. Clarke subsp. mengyangensis M.C. Tebbitt & K.-Y. Guan, Novon 12(1): 134. 2002; T.C. Ku et al. in C.Y. Wu & P.H. Raven (eds), Fl. China 13: 198. 2007. Type: China, Yunnan Province, Xishuangbanna, on the way from Puwen to Mengyang, at the bottom of valley in a wet area on the slope facing N, dense forest, 21 April 1957, Sino-Soviet Union expedition 9633 (holotype KUN0533687!).

Specimens examined.

Laos. Luang Namtha Province, Nam Ha National Biodiversity Conservation Area, Near Na Lun Village, 20°50'34.97"N, 101°20'05.69"E. 632 m elev., 23 March 2018, Y.H. Tan, B. Yang, H.B. Ding & X.D. Zeng L0095 (HITBC; HNL).

Distribution.

India, China, Bangladesh, Myanmar and Laos.

Note. The species is characterised by its dioecious and prostrate stems with large broad leaves and fleshy berry-like fruits ( Tebbitt and Guan 2002; Ku et al. 2007).

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.