The main feeding sources for livestock in Algeria are vegetation of grazed fallow lands, steppe rangelands and harvest residues. The proportion of green forages in the ration is very poor, not to say absent most of the year. Therefore, green forage production offers great possibilities. With this aim in mind we have conducted the present study on local and introduced populations of tall fescue. Traits related to green and dry matter yield, dry matter content and development have been examined. The results obtained show the superiority of local and Tunisian populations and that there are 4 high-performing varieties out of a total of 20. This work shows the importance of autochthonous varieties, which can be used to enrich forage systems by introducing temporary meadows made up of a mix of one or two species or by single species.