What is a low, thorny, suffrutescent, crucifeous plant (Zilla myagroides) found in the deserts of Egypt. Its leaves are boiled in water, and eaten, by the Arabs called?

zilla — A low, thorny, suffrutescent, crucifeous plant (Zilla myagroides) found in the deserts of Egypt. Its leaves are boiled in water, and eaten, by the Arabs. (Webster's 1913.)

Sources