Kaferian apples were a type of apple that was from Kaferia. A typical Kaferian apple resembled a pomegranate, had dark seeds inside and grew on a tree.
A cross section of a Kaferian apple was featured on the cover of the Handbook of Exobiology, used by Elizabeth Cutler in 2151. (ENT: "Strange New World")
Kaferian apples were the first form of food created by Gary Mitchell after gaining psionic powers in 2265. (TOS: "Where No Man Has Gone Before")
In the script of "Where No Man Has Gone Before", Kaferian apples are described as "huge red fruit" and the tree on which they grow is referred to as "a low, odd-shaped tree."