Botanical features of the Algerian Sahara

PLATE A
OUTLINE MAP OF ALGERIA SHOWING MAIN FEATURES OF SURFACE DRAINAGE Compiled by G. Sykes, Esq. F. R. G. S.
PLATE 1
Fig. 1. View of the Oasis of Laghouat
Fig. 2. Wood market at Laghouat. Juniper, oak, pine, and other kinds of wood, each bunch a camel load, exposed for sale.
Fig. 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.
BY WILLIAM AUSTIN CANNON
WASHINGTON, D.C. Published by the Carnegie Institution of Washington 1913
CARNEGIE INSTITUTION OF WASHINGTON Publication No. 178
PRESS OF J.B. LIPPINCOTT COMPANY PHILADELPHIA
BOTANICAL FEATURES OF THE ALGERIAN SAHARA.
The present paper is designed to give the results of some field-work in southern Algeria in the autumn of 1910 and the spring of 1911. The chief purpose of the tour was to examine the more obvious features of the physiological conditions prevalent in the region in question and, in connection with these observations, to make some detailed studies of the root-habits of the most striking species of the native flora. The route lay through the Atlas Mountains, over the High Plateau, and for some distance into the Sahara itself, returning by a somewhat similar way farther to the east. The country traversed was extremely varied in topography and in plant life, and probably the most southern regions seen may be taken as typical of much of the western Sahara. The distance covered in the more arid portions of the colony was about 1,000 miles.