marginal placentation
Definition
Noun (Botany): A type of placentation in which the ovules are attached along the fused margins (the ventral suture) of a single, simple carpel or ovary. This arrangement forms a line along one side of the ovary.
Usage
This is a highly specific botanical term used to describe the internal structure of a flower's ovary. It is primarily used in academic, scientific, and horticultural contexts.
Examples
Advanced Usage
- Comparative Botany: Marginal placentation is often contrasted with other types like axile, parietal, or free-central placentation when classifying plant families or species.
- The shift from marginal placentation to axile placentation is considered an evolutionary advancement in some plant lineages.
Variants and Related Words
- Placentation (n): The manner in which the ovules are attached within the ovary.
- Ventral suture (n): The seam or line along which the margins of the carpel fuse; the site of ovule attachment in marginal placentation.
- Simple ovary (n): An ovary formed from a single carpel.
Synonyms
- Laminal placentation (less common, but can be used synonymously in some texts).
Related Terms (Not Synonyms)
- Legume (n): A type of fruit (a pod) that commonly, but not exclusively, develops from an ovary with marginal placentation.
- Carpel (n): The female reproductive organ of a flower, consisting of an ovary, a stigma, and usually a style. A simple ovary is derived from one carpel.
Noun
-
with ovules borne on the wall along the ventral suture of a simple ovary
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