= Endocarp
The <endocarp> is the innermost region of the <pericarp>, the wall of a <fruit>. It lies inward of the <mesocarp> and surrounds the space containing the <seeds>. In a <drupe> such as a <peach>, the <endocarp> hardens into the stone.<Glossary of Botanical Terms by PlantNET>[D–E entries, endocarp and drupe]{ref}
The prefix specifies position, not one universal material. A hard <endocarp> is characteristic of a <drupe>, but naming an inner fruit-wall layer does not require every <fruit> to possess a stone. Following the <tissue> from the <ovary (botany)> into the mature <fruit> distinguishes <endocarp> from the <seed coat> inside it.
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