CANNON 



PLATE 25 





Fig. 58. Vegetation of the reg. desert, about 25km. north o( Ouargla. Ephedra and Retama 

 are the leading species of the area a spreading dune. 







'0 & 



(i» 







■> t ^. .'k- ^/ 



Fig. 59. Shoot-habit of Halocnemon strobitaceum, about 28kn). north of Ouargla. 



