Jasminanthes laotica (Apocynaceae, Asclepiadoideae), a new species from northern Laos is described, illustrated and a diagnostic key to the species of Jasminanthes Blume is given in this paper. J. laotica is allied to J. xuanlienensis T.B. Tran & Rodda, but can be distinguished by its longer sepals, obtuse to subcordate lamina base, and bright yellow of the inner corolla lobes, salmon-pink of the outer corolla lobes.