Botanical features of the Algerian Sahara

by William Austin Cannon

PLATE 33

Fig. 75. Detail of square No. 2, neat area shown in fig. 74. Ferula and Haloxylon are the leading species.

Fig. 76. Root-habit of Haloxylon scoparium, from a wash near Biskra.

Fig. 77. Young shoots and mature roots of Ferula vesceritensis. North of Biskra.

PLATE 34

Fig. 78. Root-habit of Fagonia growing on edge of a wash. Biskra.