Abstract In this study, sixty-eight flowering plant species used as medicinal treatment in Çatalca (European part of Istanbul) are reported. Among them fifty-eight species are wild and the rest ten species are cultivated plants. The plants in this research are mostly used for treatment of stomach and kidney ailments, cough, diabetes, inflammation and rheumatism. Data presented are based on interviews of local people and materials collected in the area surveyed. Researchers interviewed local people and all the specimens collected together with them were identified and prepared voucher specimens were deposited in the Herbarium of the Faculty of Pharmacy, Istanbul University (ISTE). Özet Bu çalismada, Çatalca (Istanbul, Avrupa yakasi) yöresinde tibbi amaçla kullanilan altmis-sekiz çiçekli bitki türü kaydedilmistir. Bu bitkilerden elli-sekiz tanesi dogal tür, geri kalanlar ise kültürü yapilan bitkilerdir. Arastirma alanindaki bitkiler çogunlukla mide ve böbrek hastaliklari, öksürük, seker hastaligi, iltihap ve romatizma tedavisinde kullanilmaktadir. Sunulan veriler bizzat yapilan arazi çalismalari ve yöre halkindan elde edilen bilgilerin derlenmesiyle hazirlanmistir. Yöre halki ile bizzat konusulmus, onlarla birlikte topladigimiz örnekler bilimsel olarak teshis edilmis ve herbaryum örnegi haline getirilerek Istanbul Üniversitesi Eczacilik Fakültesi Herbaryumu’nda (ISTE) saklanmaktadir.

Keywords: Traditional medicine, Çatalca, Istanbul