Comparison of Some General Features of the Vegetation of
Southern Algeria and of Southern Arizona 79
LIST OF ILLUSTRATIONS.
* * * * *
Plate A. Outline map of Algeria, showing main
features of surface drainage.
Pl. 1, fig. 1. View of the oasis of Laghouat.
2. Wood market at Laghouat. Juniper, oak, pine, and
other kinds of wood, each bunch a camel load,
exposed for sale.
3. Wood market at Laghouat. Roots of _Zizyphus_,
branches of juniper and pine, and pine bark.
The latter is said to be used for staining.
Pl. 2, fig. 4. Shoot-habit of _Acanthyllis tragacanthoides_.
Laghouat.