The present study was carried out in Kaffa Zone in general and Tello Wereda inrnparticular, southwest Ethiopia. The study in wetland vegetation of the area wasrnconducted between October 2005 and June 2006. The vegetation and environmental datarnwere collected from 88 quadrats (during wet season) and 77 quadrats (during dry season)rnfrom the six study sites. The Purpose of the study was to investigate floristic compositionrnand diversity of wetland vegetation in the area. The major issues addressed includernfloristic diversity, vegetation description, community type identification, site diversity,rnmeasurement of aboveground biomass and wetland plant inventory. During the study, thernpercentage cover abundance of each species was estimated and later converted intornmodified Braun-Blanquet 1-9 scale. Clipping of all the aboveground vegetation wasrncarried out in 1 m2 plot size, which is placed at the center of each 4 m2 quadrat, used forrnplant community description. Some environmental variables and disturbance scale wasrnrecorded for each site. A total of 69 and 56 plant species representing 28 and 27 familiesrnwere identified during wet and dry seasons respectively. The families Cyperaceae,rnPoaceae and Lamiaceae were represented by the highest number of species. All thernvegetation data were analyzed with SYNTAX-2000, computer program. Three and fourrnreasonable plant community types were obtained and described. The resulting clustersrnwere interpreted as community types and were given names after two dominant plantrnspecies. Shannon-wiener diversity index was employed to analyze species diversity in thernplant community types and the study sites. The clusters of stands were found to showrnvariation due to differences in altitude, moisture contents, and other site conditions.rnRecommendations for the sustainable utilization of the vegetation resources at the studyrnsites are provided.