Two new species of Lasianthus (Rubiaceae), L. trongii and L. hoabinhensis, are described from Vietnam. Lasianthus trongii (sect. Nudiflorae) is closely related to L. tamdaoensis but distinguished by its glabrous branches, shorter petioles, 4 calyx lobes, smaller corolla, and drupes reddish-orange, larger, and with 4 pyrenes. Lasianthus hoabinhensis (sect. Lasianthus) is similar to L. attenuatus but differs in having larger leaf blades, more secondary veins of 9–11 pairs, 6 or 7 calyx lobes, smaller corolla, and drupes with 6 or 7 pyrenes. In addition, Lasianthus laoticus, previously known only from southern Laos, is recorded in Vietnam for the first time.http://purl.org/coar/resource_type/c_650
