The lesser known plants could make a useful contribution to world food production because they are well adapted to adverse environmental conditions and are highly resistant to diseases and pests and have good nutritional qualities. In South India, the tropical forests of Western Ghats, one of the 18 biodiversically rich hot spots of the world has a large group of under utilized food plants. People of the Palliyar tribe of Srivilliputhur, Western Ghats, India use wild plants for food and supplement their diet with Dioscorea pentaphylla L., D. bulbifera L., Dolichos biflorus L., Canavalia gladiata (Jacq.) DC., Dolichos lablab L., Carissa carandas L., Syzygium cumini (L.) Skeels, Sterculia urens L. etc. Most of the wild food plants are used to treat various ailments also.