GRASSLAND COMMUNITIES OF ROCKY OUTCROPS IN THE NORTHERN ORANGE-FREE-STATE

An analysis of the grassland vegetation of the rocky outcrops of the H eilbron-Lindley-Warden-Villiers area, northern Orange Free State, is p resented. Releves were compiled in 42 stratified random sample plots. A TWINSPAN classification, refined by Braun-Blanquet procedures, revea led four plant communities. This was confirmed by the ordination of th e plant communities. All communities could be related to specific envi ronmental conditions. A hierarchical classification and phytosociologi cal description of the plant communities are presented.