autocarpous

from The Century Dictionary.

• In botany, consisting of pericarp alone; having no adnate parts (Gray): applied to fruits which are free from the perianth. Same as superior.
• Self-fruiting, that is, fruiting as the result of self-fertilization.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Bot.) Consisting of the ripened pericarp with no other parts adnate to it, as a peach, a poppy capsule, or a grape.