Aspects of this topic are discussed in the following places at Britannica.
...is ordinarily used by the Bedouin for bushes in the desert that furnish grazing for his animals and firewood for his tent. The leaves of varieties called hamd have enough salinity to satisfy the camel’s need for salt. The tough perennials are as essential to life as the tender annuals nourished by the rains of winter and spring. The rains...
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