BIOL 120A Chapter 6: Chapter 6 Detailed Notes
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The fruit wall that develops from the ovary wall is known as the pericarp and is composed of three layers: the outer exocarp, the middle mesocarp, and the inner endocarp. Simple fruits are derived from the ovary of a single carpel or several fused carpels and are described as fleshy or dry. Berry: a thin exocarp a soft fleshy mesocarp, and an endocarp enclosing one to many seeds. Hesperidium: a berry with a tough leathery rind such as oranges, lemons, and other citrus fruits. Pepo: a specialized berry with a tough outer rind (consisting of both receptacle tissue and exocarp); the mesocarp and endocarp are fleshy. Drupe: a thin exocarp, a fleshy mesocarp, and a hard stony endocarp that encases the seed. Pomes: most of the fleshy part of pomes develops from the enlarged base of the perianth that has fused to the ovary wall. Dehiscent: fruits split open at maturity and so release their seeds.
