grazing > fuel > human food > other uses. The mono-regional and bi-regional species were the highest, while pluri-regional and cosmopolitans were the lowest. Of the mono-regionals, 36 species were Sudano-Zambezian, 17 species were Irano-Turanean and 16 species were Saharo-Arabian. The application of TWINSPAN on the cover estimates of 165 species recorded in 75 stands, led to the recognition of 8 vegetation groups (communities) at 3rd level of classification (I: Mentha longifolia group, II: Salsola imbricata group, III: Cynodon dactylon group and IV: Pluchea dioscoridis groups on the wetland wadis, and V: Aera javanvica group, VI: Acacia gerrardii var. gerrardii group, VII: Calotropis procera group and VIII: Acacia gerrardii var. gerradii-Solanum incanum groups on multi-wadis).]]>
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