Sodom.

Many suggestions have been made as to what tree this refers to. Josephus speaks of some fruits that grew near the Dead Sea, which "have a colour as if fit to be eaten, but if plucked they dissolve into smoke and ashes." Many have sought for such fruit. Some judge the vine alluded to in scripture to be the poisonous colocynth, which grows near the Dead Sea. May not the term be symbolical of that which leads to destruction, which was the doom of Sodom? De 32:32.