Abstract In this study, medicinal uses and methods of administration of 45 wild plant taxa belonging to 27 families in Yalova are documented. The plant specimens were collected with informants. During the field works all the settlements (58 villages) were visited. The information was recorded and the collected plants were identified and prepared voucher specimens were kept in the Herbarium of Istanbul University Faculty of Pharmacy (ISTE). Özet Bu çalismada, Yalova’da tibbi amaçli kullanilan 27 familyaya ait, 45 dogal taksonun kullanilis nedenleri, uygulanis sekilleri arastirilmis ve kaydedilmistir. Bitkiler bilgi veren kisiler ile birlikte toplanmistir. Arazi çalismalari sirasinda bütün yerlesim yerlerine (58 köy) gidilmistir. Bilgiler kaydedilmis, toplanan bitkiler teshis edilmis ve hazirlanan herbaryum örnekleri Istanbul Üniversitesi Eczacilik Fakültesi Herbaryumu (ISTE)’nda saklanmistir.
Keywords: Medicinal Plants, Folk Medicine, Yalova, Turkey