CANNON 



PLATE 10 



ft* 



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



Fig. 25. Shoot-habit of Salvia aegyptica. Ghardaia. 



Fig. 26. Upper surface of rocks, showing small 

 incrusting lichens, on a low mountain about 

 5km. north of the M'Zab Valley, Ghardaia. 



