"Solanum dregei" and "Solanum subhastatum" redirect here. These taxa can also refer to other species; see below for details.Solanum aculeastrum is commonly known as soda apple, sodaapple nightshade, goat apple, poison apple, or more ambiguously as "bitter-apple". It is a poisonous nightshade species from Africa and not related to true apples. The term "soda apple" probably derives from "Sodom apple", modified due to the fruit's detergent properties.