CANNON 



PLATE 2 



Fig. 4. Shoot-habit of Acanlhyllis tragacanthoides. 



Laghouat. 



— »-^»-«^ — 



Fig. 5. Shoot-habit o( Zollikoferia spinosa. 

 Laghouat. 



:; 





Fig. 7. Zolliko(eria spinosa in habitat, plain (hamada). Laghouat. 



