This study highlights the knowledge of floristic composition of one of the Wadis, which did not have sufficient previous studies. Number of plant species recorded in Wadi Al–Hilali 116 species. These plant species belong to 26 plant families. Asteraceae and Poaceae were the most common families with 18.1 % and 12.1 % of species composition, respectively. Both Brassicaceae and Fabaceae were represented by 10.3 % for both of them. The common life span was annuals with 72.4 %, followed by the perennials with 24.1 %. Therophytes were the majority life form with 70.7 %. According to phytogeographical affinities, the recorded species were classified into three groups: monoregional (29.3 %), bioregional (43.1) and pluriregional (14.7 %). In addition to, cosmopolitan species (6.9 %), paleotropical (2.6 %) and pantropical (3.4%).