Impatiens karuppusamyi P.S.S. Rich. & V. Ravich (Balsaminaceae), a new species from the southern Western Ghats in Tamil Nadu, India, is described and illustrated. It is similar to I. bicornis, but differs from it in having small leaves; 6–8-flowered, short scape; small flower ca. 1 cm across; conical spur that is horizontally straight with an obtuse tip; base of the anterior lobe with two purplish, fleshy and erect auriculate projections to 1 mm long; stout biseriate purplish-blue hairs in front of the mouth; and orange-pinkish pollen grains.