The development of embryo sac of Disperis neilgherrensis Wight was studied. The ovule is anatropous, bitegmic and tenuinucellate, The inner integument alone forms the micropyle. The megaspore of a triad nearest to the chalaza develops into 8-nucleate ernbryo sac. Trhe mode of embryo sac development conforms to monosporic Polygonum and G1a type of Abe (1972b). The mature embryo sac contains an egg apparatus, two polar nuclei and three antipodal cells. Doulble fertilization occurs normally.