(B) The wing of the $Pinus$ seed is derived from the adaxial surface of the ovuliferous scale. As the seed matures,a thin,papery layer of the ovulifer

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Adaxial surface of ovuliferous scale

(B) The wing of the $Pinus$ seed is derived from the adaxial surface of the ovuliferous scale. As the seed matures,a thin,papery layer of the ovuliferous scale tissue separates and remains attached to the seed coat $(testa)$,forming a wing that aids in wind dispersal.