Vine of Sodom - referred to only in Deut. 32:32. Among the many conjectures as to this tree, the most probable is that it is the osher (Calotropis procera) of the Arabs, which grows from Jordan to southern Egypt. Another conjecture equates it with the colocynth (Citrullus colocynthis).
Its fruit are called "apples of Sodom", which, though beautiful to the eye, are bitter to the taste. (See Ein Gedi.)