Uses Castor (Ricinus communis)

Part Used : Oil, Leaves, Roots, Seeds, Fruit

Chemical constituents : Fatty oil, Protein, Lectins, Others ricin D (RCA-60. severely toxic), RCA-120 (less toxic), Pyridine alkaloids, Triglycerides: chief fatty acids ricinoleic acid (12-hydroxy-oleic acid, share 85-90%), Tocopherols (Vitamin E).

Uses : Castor oil is a natural skin and hair softener and is used to treat skin diseases like ringworm and itching. It also uses in abdominal disorders, colic, enlarged liver and spleen, fever, headache, lumbago, nervous diseases, pain  relief (joints), promote menstrual discharge, promote milk production, rheumatism, sciatica.

http://en.wikipedia.org/wiki/Castor_oil_plant

http://www.home-remedies-guide.com/herbs/castor-seeds.htm

http://www.holistic-online.com/herbal-med/_Herbs/h144.htm

Courtesy: Various Sources over internet