The term bush tomato refers to the fruit or entire plants of certain nightshade (Solanum) species native to the more arid parts of Australia. While they are quite closely related to tomatoes (Solanum lycopersicum), they might be even closer relatives of the eggplant (S. melongena), which they resemble in many details. There are 94 (mostly perennial) natives and 31 (mostly annual) introduced species in Australia.