RESUMELa caractérisation des enherbements des parcelles agricoles environnant la forêt classée de Sanaimbo a été réalisée à partir de 310 relevés phyto-écologiques. La flore adventice comprend 398 espèces. ABSTRACT WEED FLORISTIC DIVERSITY AND INFESTATION DEGREE IN THE FIELDS SURROUNDING SANAIMBO CLASSIFIED FOREST IN THE CENTRE-EASTERN CÔTE D'IVOIRECharacterization of weed communities in the fields surrounding the classified forest of Sanaimbo was done through 310 phyto-ecological plots. The weeds flora is made of 398 species. They are listed according to their frequency and abundance. Quantitative floristic analysis shows that the more frequent species are Chromolaena odorata, Panicum laxum, Pouzolzia guineensis, Solanum erianthum, Lapotea aestuens, Spigelia anthelmia and Mariscus cylindristachyus and the weeds that more cause damage are Chromolaena odorata, Euphorbia heterophylla, Croton hirtus and Ageratum conyzoides. But the most noxious weed is Chromolaena odorata.