Aristolochia quangbinhensis T.V. Do, a new species from Central Vietnam, is described and illustrated. According to morphology, the species belongs to Aristolochia subgenus Isotrema. A detailed description, along with line drawings, photographs, ecology, distribution, conservation status as well as a comparison to morphologically similar species is provided.
Keywords: Aristolochia; Aristolochia quangbinhensis; Aristolochiaceae; Isotrema; Vietnam; new species.