Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity a new species of Convolvulaceae from the southern Western Ghats of Tamil Nadu is described and illustrated here. The new species is morphologically different from its closely related species A. involucrata C.B.Clarke especially in its habit, shape, apex and texture of leaves, attachment of the stamens and in the length of the filaments. The micro-morphological features of pollen grains are provided. © 2020 Indian Association for Angiosperm Taxonomy. All rights reserved.