Sunday, March 4, 2018

[Botany • 2018] Begonia lecongkietii • A New Species of Begonia (sect. Petermannia) from Mount Dầu, South Central Coast Region, Vietnam

 Begonia lecongkietii N.S.Lý & M.Hughes

in Lý, Peng & Hughes, 2018.

A new species of Begonia (B. lecongkietii N.S.Lý & M.Hughes) is described from Mount Dầu in the South Central Coast Region, Vietnam, an area with an abundance of recently described endemic plant taxa. The new species is allied to Begonia lamxayana Souvann., which occurs 600 km away in Laos, differing chiefly in having larger villose tepals with an undulate margin and larger androecium with 86–116 (versus 20–30) stamens. Begonia lecongkietii is considered Critically Endangered, owing to its small area of occupancy and decline of habitat quality.

Keywords: Biodiversity, conservation, endemism, taxonomy

Fig. 1. Begonia lecongkietii. A and B, Plants in their natural habit; C, inflorescences showing female flowers of different colours; E, detail of male and female flowers; F, top view of androecium; G, close-up of female flower; H, detail of stigma.

Scale bars: E–H, 10 mm.
Photograph by Ngo. c-Sâm Lý: A, Lý 572; B–J, Lý 608.

Begonia lecongkietii N.S.Lý & M.Hughes, sp. nov. Sect. Petermannia 

Distribution: Begonia lecongkietii is endemic to Quảng Ngãi Province in the South Central Coast Region, Vietnam.

Etymology. Named in honour of Professor Lê Công Kiệt, University of Science, Vietnam National University, Ho Chi Minh City, for his long-time contribution to Vietnamese botany

N.-S. Lý, C.-I. Peng and M. Hughes. 2018. Begonia lecongkietii (sect. Petermannia), A New Species from Mount Dầu, South Central Coast Region, Vietnam. Edinburgh Journal of Botany. DOI:  10.1017/S0960428618000033