A new species of Derris Lour. (Fabaceae: Papilionoideae) from Tamil Nadu, India

AbstractA new species, Derris matthewii, is described from the dry evergreen forests of the Alagar Hills, Tamil Nadu, India. The new species closely resembles Derris ovalifolia (Wight & Arn.) Benth., but differs in leaflet shape, texture and 8–10 pairs of lateral veins, petiolule length, articulated pedicels, calyx campanulate, glabrous, and ovary glabrous.