What does cleistogamous mean?
Cleistogamous is a specialized botanical adjective describing plants that produce cleistogamous flowers: flowers that stay closed and self-pollinate, with pollen transferred from the anthers to the stigma within the same flower. The strategy can allow a plant to reproduce even when pollinators are absent, when flowering occurs out of season, or when conditions make the movement of pollen between separate flowers difficult. Some species produce both open, often cross-pollinated flowers and closed, self-pollinating ones, allowing them to balance genetic variation with reproductive reliability. The term is especially associated with scientific descriptions of plant reproductive biology rather than ordinary conversation. Its unusual form may be easier to remember by connecting it with “cleistogamy,” the noun naming this process, and with its contrast, “chasmogamy,” which describes flowers that open.
adjectiveOf or relating to cleistogamy; having flowers that remain closed and self-pollinate. In botanical usage, the term describes plants whose flowers do not open, so pollination occurs within the flower.
- Botanical adjective describing flowers that remain closed and undergo self-pollination, or plants that produce such flowers.
"The diminutive violet produced cleistogamous flowers that remained closed throughout the growing season."
"The species produces both showy open flowers and cleistogamous flowers that secure pollination even when pollinators are scarce."
"Cleistogamous plants can set seed in sheltered or isolated habitats where insect pollination would be unreliable."
Some flowers keep their love life private: cleistogamous blooms stay closed and fertilize themselves.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does cleistogamous come from?
The word derives from Greek kleistos, meaning “closed,” and gamos, meaning “marriage,” through the botanical concept cleistogamy. The terminology contrasts with chasmogamy, from Greek khasmos, “opening,” or “gap,” referring to flowers that open. English later developed “cleistogamous” as an adjective describing plants or flowers exhibiting this closed-flowering reproductive strategy.
Related word forms
How cleistogamous is actually used
A specialized botanical term, chiefly used in descriptions of plant reproduction and flowering behavior. It is more precise than simply saying “self-pollinating,” because it specifically implies that the flowers remain closed.
Easily confused with cleistogamous
Cleistogamous flowers remain closed and self-pollinate, whereas chasmogamous flowers open and are typically pollinated from another flower.