Riverine vegetation along Beschillo and Blue Nile rivers was studied with the aim ofrncompiling floristic composition and describing its plant communities. The area studiedrnoccurred between altitudinal gradients of 1324 and 626m. Beschillo is a tributary of BluernNile River from which the study was started at a point between Mekdela and Tach-Gayintrnâ€˜woredasâ€™ in Amhara Regional State (11025.232â€™ N & 380 42.331â€™ E) up to the point atrnwhich it joins the Blue Nile River (11002.121â€™ N & 38028.521â€™ E) and then continued tornSirba Abay (10007.492â€™ N & 35020.919â€™ E), which is located in Benishangul-GumuzrnRegional State. A total of 580 km was covered to study the riverine vegetation along therntwo rivers. The data was collected in October and November 2005. Along the rivers,rnnested belt transects were laid at 500 or 1000 m interval from the riverbank to thernadjoining upland. A total of 74 releves were analyzed within 43 transects. The number ofrnplots in each transect was determined by the size of riverine vegetation which laid from thernstream edge to the adjoining upland. Cover abundance value for each species wasrnestimated based on Braun- Blanquet approaches as modified by Van der Maarel (1979).rnThe number, height, and diameter at breast height (DBH) >2.5cm were measured for allrntree individuals. A total of 205 vascular plant species were recorded of which, 47.32% werernherbs, 6.83 % climbers, 22.44% shrubs and 23.41% were trees. A total of 53 Families andrn152 Genera were registered, of these 12% were Poaceae, 10% Fabaceae, 5.4%rnAcanthaceae, 4.9 % Malvaceae and 4.4% Tiliaceae. The output of cluster analysis revealedrn6 distinct plant community types. Structural parameters such as Density, Frequency,rnDominance, and Important Value Index were calculated. Shannon-Weiner Diversity Indexrnwas also computed. The density of tree species per ha was 115 whereas the total basalrnarea (BA) of trees species m2 / ha was 12.6. Most of the tree individuals distributed inrnmiddle diameter and height classes.