After an Environmental and Social Impact Assessment of operating the Agbaou gold mine work, the company ENDEAVOUR MINING agreed to create a refuge area for biodiversity, its gold site. The present study was conducted to assess the plant diversity of this site, and its value for the conservation of flora. Floristic inventories were made in plots of 200 m2 where the presence / absence of all plant species were noted. Circumferences of tree species with dbh ? 5 cm were measured. The particular status species have been identified. Diversity indices were calculated as well as the importance values for tree species. The inventory has identified 358 species of which 31 are among those classified as rare, threatened or having different levels of endemism. These are species such as Cola lorougnonis and Drypetes singroboensis considered by national botanists as missing ivorian flora. The most important tree species are Celtis zenkeri, Pterygota macrocarpa, Mansonia altissima, Ricinodendron heudelotii, Ceiba pentandra and Nesogordonia papaverifera. All these timber species are very popular in the area because overexploitation. Shannon index varies from 1.3 to 3.57 showing a variation in level of plots degradation. The example of the Forest reserve D