Alkaloidal Contents of Some Plants Belonging to families Solanaceae and Labiatae

The importance of alkaloids is represented in its economic hazard to livestock in various parts of the world and health hazard to man. Moreover the therapeutic application of some alkaloids as antitumor, antispasmodic . mydriatic and antimalarial....etc. raise their importance.Our study comprises the isolation and structure determination of the isolated alkloids from the following plants :1- a- Solanum Unguiculatum (A) rich. Family Solanaceae.b- Solanum Sepicula (Dun.) Family Solanaceae.11- Marrubium alysson (L.) Family Labiatae.