Fig. 5. Shoot-habit of Zollikoferia spinosa. Laghouat.

Fig. 6. Acanthyllis tragacanthoides on sandy plain. Laghouat.

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

PLATE 3

Fig. 8. Detail of north slope of Nomad Mountains where Zollikoferia spinosa is the dominant species. Laghouat.