The present study was initiated to contribute to the sustainable management of the Niégré classified forest. It analyzed the floristic diversity, vegetation structure and conservation value of this forest. The methodology used consisted in randomly installing 100 m x 20 m (2,000 m2) plots in each biotope (old-growth forest, 1-10 year-old fallow, 11-19 year-old fallow, 20-30 year-old fallow and 30+ year-old fallow). In each plot, chest height diameter (CHD) and height measurements were taken for all woody species 2.5 cm and over. A total of 419 species in 286 genera and 92 families were recorded. The most important families are Fabaceae, Rubiaceae and Euphorbiaceae. The flora of this forest is also characterized by the presence of special-status species (55), two of which are endemic to Côte d’Ivoire. This work also shows that stand composition and structure parameters increase with the age of the fallow. Efforts to conserve the endemic, rare and endangered species of the Niégré classified forest must be a top priority.