= Accessory fruit
An <accessory fruit> is a mature <fruit> structure to which tissue outside the <ovary (botany)> contributes, often forming much of the flesh. The name concerns developmental origin. An <apple> illustrates one arrangement: the central core derives from the <ovary (botany)>, while the surrounding <hypanthium> contributes much of the edible tissue.<Global gene expression analysis of apple fruit development from the floral bud to ripe fruit by Bart J. Janssen and others>[Background, core/ovary and cortex/hypanthium]{ref}
A <strawberry> illustrates another arrangement. Its flesh is an enlarged <receptacle (botany)>, and the small units on the surface are individual <achenes>. Cutting through one of these units and separately through the flesh distinguishes the <seed>, the wall of its individual <fruit>, and the common supporting tissue.<Genome-scale transcriptomic insights into early-stage fruit development in woodland strawberry Fragaria vesca by Chunying Kang and others>[Abstract; receptacle flesh and numerous dry surface achenes]{ref}
<Accessory fruit> and <aggregate fruit> describe different properties: the former concerns contributions from non-ovarian tissue, while the latter concerns <fruits> developing from several separate <carpels> of one <flower>. Both descriptions apply to the <strawberry> arrangement. In <Fragaria vesca>, dissecting tissues and profiling <gene expression> across developmental stages allowed researchers to investigate how these distinct parts grow together.<Genome-scale transcriptomic insights into early-stage fruit development in woodland strawberry Fragaria vesca by Chunying Kang and others>[Abstract and study design; five tissue types and five developmental stages]{ref}
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