CANNON 



PLATE 10 



* 



4ni 



Fig. 24. Leaf-habit of Daemia cordata. Ghardaia. 





Fig. 25. Shoof-habit of Salvia a;gyptica. Ghardaia. 



Fig. 26. Upper surface of rocks, showing small 

 incrusting lichens, on a low mountain about 

 3 km. north of the M'Zab Valley, Ghardaia. 



