This study was conducted on Komto Forest in East Wollega Zone, Oromia National RegionalrnState, west Ethiopia with the objective of determining the floristic composition, vegetationrnstructure, community type and regeneration status for some tree species in the forest.rnSystematic sampling method was used to collect vegetation data. Accordingly, 53 quadratsrneach with 400 m2 (20 m X 20 m) for woody species and subplots of 1 m X 1 m within the mainrnplots for herbaceous plants were laid along line transects radiating from the peak of KomtornMountain in 8 directions. All plots (quadrats) were laid at a distance of 200 m along therntransect lines. For seedlings, the main quadrats were divided into subplots of 10 m X 10 mrn(100 m2) to make seedling counting easier. In each of these quadrats, all vascular plantrnspecies were collected and brought to ETH for identification. In addition, vegetationrnparameters such as DBH, height and seedling and sapling density of woody species includingrnlocation and altitude of each quadrat were recorded. Vegetation classification wasrnperformed using PC-ORD software packages. Sorensensâ€™s similarity coefficient andrnShannon-Wiener diversity index were also used to detect similarities among communities andrnto compute species richness and evenness between the plant communities respectively. Arntotal of 180 species in 151 genera and 66 families were identified from the forest out ofrnwhich 31 were new records from Wollega (WG) floristic region for the flora of Ethiopia andrnEritrea. Fabaceae and Asteraceae are the dominant familes in terms of species richness.rnFurthermore, 18 endemic species some of which are under the Red Data List of IUCN werernalso identified. In this study, four plant communities were identified and described.rnStructural analysis of some selected tree species revealed different population pattern.rnGenerally, the forest was dominated by small sized trees and shrubs indicating that it is inrnthe stage of secondary regeneration. Phytogeographical comparison of Komto Forestrnrevealed the highest similarity with moist montane forests which asserts that Komto Forest isrnone of the moist montane Forests in Ethiopia. Studies on the structure and regeneration ofrnthe forest indicated that there are species that require urgent conservation measures.rnTherefore, based on the results of this study, detailed ecological studies in relation to variousrnenvironmental factors such as soil type and properties, ethnobotanical studies to explorernindigenous knowledge on the diverse uses of plants, and sound management and monitoringrnas well as maintenance of biodiversity that promote sustainable use of the forest and itsrnproducts are recommended.rnKey Words/Phrases: East Wollega Zone, Komto Forest, Plant community, Speciesrnrichness, Regeneration, and Sustainable use of forest and its products