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placentation

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angiosperm development

  • In placenta

    The placentation, or arrangement of ovules within the ovary, is frequently of taxonomic value. Placentation is usually submarginal in a simple pistil (female sex organ). In a compound pistil, two or more carpels are used in various ways, placentation being parietal, with carpels united by their…

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  • snake gourd flower
    In angiosperm: Seeds

    The arrangement of placentae (placentation) in the compound ovary of angiosperms is characterized by the presence or absence of a central column in the ovary and by the site of attachment (Figure 14). In axile placentation the placentae are located on a central column; partitions from the central column…

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  • Bumblebee on teasel
    In plant reproductive system: Angiosperms

    …ovular attachment is known as placentation. The ovary may contain one to many ovules, which may be attached to the ovary wall (parietal placentation) or to the central axis (axial, or free-central, placentation). Despite these and other variations in the morphology of flower parts, the reproductive process is, with minor…

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