No, hedge apples and horse apples are not the same. Hedge apples refer to the fruit of the Osage-orange tree (Maclura pomifera), which is native to south-central United States. Horse apples, on the other hand, refer to round fruits produced by several species in the genus Amelanchier, including Allegheny serviceberry (Amelanchier laevis) and common serviceberry (Amelanchier arborea). While both types of fruits have similar appearances, their tastes differ significantly; hedge apple has a sour taste while horse apple has a sweet flavor. In addition, their shapes also vary; hedge apple is typically rounder than horse apple.