Form structure of 9 grass assemblages in Dak Lak province belongs to the simple type (having 2-3 layers), the advantage type often to be seen is Imperata cylindrica. 9 grass assemblages are arranged 5 formations and belongs to 2 inter-formations, typically for savanna. Inter-formations include of formations from seven to nine, specific for dry grass fields. Both of the inter-formations origin the secondary succession, formed by deforestation. Inter-information 2 is the continuing status in the sequence of degenerative succesion of inter-formation 1 caused by people effect, which is improved completely.