What does hypogyny mean?
Hypogyny is a botanical term for a particular arrangement of the parts of a flower. It occurs when the sepals, petals, and stamens are attached below the ovary, so the ovary is described as superior in position. This structure differs from perigyny, in which the other floral parts surround the ovary in a cup or receptacle, and from epigyny, in which they arise above it. Hypogyny appears in descriptions of flowers in many plant families and is especially useful when identifying or comparing species. The associated adjective is hypogynous, as in “a hypogynous flower.” Although relatively uncommon outside botanical and horticultural contexts, the term allows flower structure to be described precisely and distinguishes the relative positions of reproductive and supporting organs.
nounIn botany, a floral arrangement in which the sepals, petals, and stamens are inserted below the ovary. The ovary is consequently described as superior.
- The arrangement of a flower in which the sepals, petals, and stamens are inserted below the ovary, making the ovary superior.
"The botanist noted that the species displays hypogyny, with all the non-ovarian floral parts positioned beneath the ovary."
"The species has conspicuous yellow petals and displays hypogyny, with the stamens arising below the ovary."
"Researchers used floral anatomy to distinguish the plant's hypogyny from the perigynous condition found in a related species."
The plural is rare and chiefly occurs in technical botanical writing.
"The researchers compared examples of hypogyny and perigyny across several flowering-plant families."
A flower can have its ovary perched above the other floral parts—a botanical arrangement known as hypogyny.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does hypogyny come from?
The word was formed in New Latin from Greek elements meaning “under” and “female,” reflecting the position of the ovary above the other floral parts in the structure called hypogyny. Its formation follows the broader botanical practice of describing floral-part positions through Greek-derived terminology. Related words such as gynoecium and gynecology share the Greek root gyna, meaning “woman” or “female,” used in its anatomical and botanical senses.
Related word forms
How hypogyny is actually used
This is a specialized botanical term, normally used in formal descriptions of floral structure. In British and American botanical writing, it contrasts with perigyny and epigyny.
Easily confused with hypogyny
In perigyny, the sepals, petals, and stamens surround the ovary in a cup-like receptacle, whereas in hypogyny they arise below it.
In epigyny, the other floral parts are borne above the ovary, while in hypogyny they are positioned below it.