marginal placentation

9.8

Seeds attach in a single row along one side of a pod, like in peas

noun
/ˈmɑrdʒɪnəl pləˌsɛnˈteɪʃən/

Specialized

: placentación marginal

In marginal placentation, ovules are attached along the ventral suture.

Examples

In legumes such as peas and beans, marginal placentation is commonly observed within their pods.
The botanist explained that marginal placentation is characteristic of simple, unilocular ovaries.
When studying flower anatomy, students learned to identify marginal placentation in various plant families.
The pea plant exhibits marginal placentation.
In legumes such as peas and beans, marginal placentation is commonly observed within their pods.
The botanist explained that marginal placentation is characteristic of simple, unilocular ovaries.
When studying flower anatomy, students learned to identify marginal placentation in various plant families.

Synonyms

ventral placentation

vsmarginal placentation

Specialized

9.3

A way the parts that become seeds attach to the inner wall of a plant ovary

is the specific form with ovules arranged in a row along the ovary wall

Surface Forms

marginal placentation singular

marginal placentations plural

Morphology

marginal + placentation

The phrase combines 'marginal' (located at the outer border) with 'placentation' (the placement pattern of ovules), so the meaning — ovules positioned along the margin of the ovary — is directly inferable from the parts. Although it is a technical botanical term, the adjective+noun composition is transparent and follows regular descriptive patterns common in scientific vocabulary, so a learner who knows both constituents can predict the meaning.

Etymology

Marginal placentation comes from a simple picture: marginal means 'edge' and placentation means 'where seeds are placed'. In some plants like peas, the seeds sit in a neat row along the pod's edge, so the term describes seeds attached along that edge.