A contribution to the vegetation and habitat types of Baha plateau (Saudi Arabia)

The present study deals with the vegetation of Baha plateau (19°50′–20°18′N, 41°38′–42°10′E), with elevation ranging between 1700 and 2400 m. Ten plant communities are recorded: communities dominated by trees (Acacia negriiandJuniperus excelsa); communities dominated by shrubs and undershrubs (Acacia tortiiis, Olea europaea, Dodonaea viscosa, Pulicaria crispa, Rumex limoniastrumandAstragalus atropilosus); communities dominated by grasses (Hyparrhenia hirta) and a community dominated by ephemerals (Achillea biebersteinii – Cardaria draba). 167 species of vascular plants are recorded. Relations between communities and their habitat types as well as the human impact in the area are briefly discussed.