Botanical features of the Algerian Sahara

by William Austin Cannon

Fig. 38. Euphorbia guyoniana, in the valley of the Oued M’Zab at Ghardaia.

PLATE 17

Fig. 39. Habit of Euphorbia guyoniana. Ghardaia.

Fig. 40. To the left, shoot of Centaurea sp., showing effects of grazing; to the right, shoots of Teucrium pseudo-chamæpitys. From Ghardaia.

PLATE 18

Fig. 41. Habit of Salsola sp. (below), and Echinopsilon muricatus, from the M'Zab Valley, Ghardaia.