Dioscorea polystachya Turcz. (Dioscoreaceae), is reported here for the first time in India based on the collections from Mussoorie, Uttarakhand. The species is unique with its ternate or opposite, hastate-cordate leaves and zigzag staminate inflorescence axis. The species is illustrated and its detailed description, phenology, habitat and distribution are provided to aid easy identification. © 2018 Indian Association for Angiosperm Taxonomy. All rights reserved.