Five wadis proliferate in the area surveyed (latitudes
27°-28 N and longitudes 33°-34 E) drain this part of
the Red Sea mountains into the sea (lower Gulf of
Suez)./This wadi system have distinguished variation
in geomorphological and edaphic characteristicS. ACcordingly four associations phytosociologically identified are reflections of such variations. Such associations are not repetitions to those identified before in this series of investigations. Also, they have no analogues among communities recognized in this desert by other investigators.