Lycium species growing in Turkey have not so far been studied sufficiently. For lhis reason, non-polar and polar extracts obtained from the fruits of Lycium barbarum L. and L. ruthenium Murray (Solanaceae) were assessed both in vitro for their potential as free radical scavenger crude extracts and their phenolic composition. Fruits of Lycium species were sequentially extracted with petroleum ether, ethyl acetate, methanol, n-butanol, and water in a Scxhlet extractor. All the extracts were assessed for the scavenging of the nitrogen-centered free radical 1,1′-diphenyl-2-picrylhydrazyl (DPPH •) by in vitro method. Furthermore, the composition of each extract was investigated both in terms of its Foun-Ciocalteau reactive components and its qualitative content. The phenolic compounds within the extracts were determined as benzoic acid and hydroxycinnamic seid derivatives, flavonoids, and anthocyanins according to their retention time and UV spectral data by HPLC-DAD system.