Ceratophyllum platyacanthum Cham. subsp. oryzetorum (Kom.) Les (Ceratophyllaceae) is recorded for the first time from Kashmir Himalaya and India. The species differs from its closely related taxon, Ceratophyllum demersum, in having smaller leaves and the fruit with a facial spine. A comparison between Ceratophyllum demersum and C. platyacanthum subsp. oryzetorum, and the taxonomic description, photographs and distribution map are provided to facilitate its field identification in the region.