Six taxa of flowering plants from Bolaven plateau, southern Laos, are newly recorded for the flora of Laos; Arnicratea cambodiana (Pierre) N. Hallé, Celastrus hindsii Benth. (Celastraceae), Bauhinia pottsii G. Don var. subsessilis (Craib) de Wit (Fabaceae), Erythroxylum cuneatum (Miq.) Kurz (Erythroxylaceae), Liparis regnieri Finet (Orchidaceae) and Sphenodesme mollis Craib (Lamiaceae). Voucher specimens, geographical distribution, ecology in Laos and photographs are provided for each species. In addition, asecond-step lectotypification is proposed for Hippocratea cambodiana Pierre, a basionym of A. cambodiana.