Botanical features of the Algerian Sahara

by William Austin Cannon

Fig. 79. Large lateral root of Haloxylon, with numerous deciduous rootlets, no longer functional.

Fig. 80. Shoot-habit, taken from above, of Fagonia from the flood-plain of a small oued near Biskra.

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Fig. 81. Spring annuals, March 17th, on north slope of the Djebel Bou Rhezal, Biskra.

Fig. 82. Root and shoot habit of Peganum harmala, Biskra. The main root is especially well developed although the species has a generalized root-system. (See text.)

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