CANNON 



f 





— - :'^--Ter *i _ . 



Fig. 64. Tamarix sp. as a sand-binder near Bled-el-Amar, south of Touggourt. 







:;^.: 



Fig. 63. Biskra Habitat of Euphorbia guyoniana. looking toward the Djebel Maouya, with the Chaine de 



Sfa in the background. 



