CANNON 



PLATE 25 



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

 are the leading species of the area a spreading dune. 



^ Si 



AT" 6 



- 



Fig. 59. Shoot-habit of Halocnemon strobilaceum, about 28km. north of Ouargla. 



