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A megasporangium (PO:0025201) in a seed plant, composed of fleshy subepidermal tissue that is part of a plant ovule (PO:0020003) and surrounds a megasporocyte (PO:0000431).
A nucellus that is part of a fruit.
A portion of plant tissue that is the morphologically distinct outer layer of the nucellus.
A portion of plant tissue that is the morphologically distinct portion of the nucellus overlying the vascular strands in the grass caryopsis.
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