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Flowers

45-Marginal placentation

[FMP-field: image]

The upper drawing shows a lateral view of an apocarpous gynoecium. The lower drawing represents a cross-section of this gynoecium. It shows the arrangement of the ovules within the ovary. The arrangement and attachment of ovules within the ovary is called placentation.

The placentae is the region or the line(s) along which the ovules are attached.

A locule is a chamber within the ovary.

In monocarpous and apocarpous gynoecia (i.e. carpels distinct), the ovules are arranged along the suture of the carpel. There is one locule per carpel, no septum (see definition on next slide). This is called marginal placentation.


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