Fig. 70. Young shoots of Phelypæa violacea, at north base of Ed Delouatt hills, Biskra.
Fig. 71. Habit of young specimens of Phelypæa. Except for about 15cm., plants were buried by sand. Biskra.
Fig. 72. Asphodelus sp. at north base of Ed Delouatt hills, Biskra. Photographed in March.
PLATE 32
Fig. 73. Detail of square No. 1, on low hills north of Biskra.
Fig. 74. Vegetation of north slope of the low hills which are north of Biskra. Ferula vesceritensis is the perennial appearing in the figure.