From very old days to recent civilization, human species depends on most of the natural resources for smooth running of their life. In nature specifically plants has a key source of drugs and its remedies. Feronia Limonia belonging to family Rutaceae is well known in Indian traditional systems for its traditional uses. Various parts of the plant like leaves, fruits, roots, bark have an astringent, constipating, tonic for liver and lung, diuretic, carminative, and cardiotonic effect and these are traditional uses. Various chief phytoconstituents like alkaloids, phenolic compounds, triterpenoids, tannins, steroids etc. have been isolated from Feronia Limonia. But only few pharmacological activities like antimicrobial, antiviral, antitumour, antifungal etc. activities have been scientifically reported. From huge traditional uses documented in various traditional system of medicine and presence of vital phytoconstituents make Feronia Limonia an important plant to be studied scientifically to prove a variety of traditional uses. In present work we look at Feronia Limonia description, traditional medicinal uses, and phytoconstituents and anthelmintic activity of its leaves. Five concentrations (10, 25, 50, 75 and 100 mg/ml) of aqueous extract of leaves Feronia Limonia were studied for an anthelmintic activity on adult Indian earthworms Pheretima Posthuma in a bioassay, which involved the determination of time of paralysis and time of death of the worms using Piperazine citrate as reference standard. The results indicated that 100 mg/ml concentration of Feronia Limonia leaves was more significant than that of other concentration