Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


Of or relating to a flower that does not open and is self-pollinated in the bud.

[Greek kleistos, closed (from kleiein, to close) + -gamous.]

cleis·tog′a·my (-mē) n.


(Botany) self-pollination and fertilization of an unopened flower, as in the flowers of the violet produced in summer. Compare chasmogamy
cleisˈtogamous, cleistogamic adj


the state of bearing small flowers as well as fully developed ones, as in the pansy, in which the small ones do not open but are pollinated by their own anthers. — cleistogamous, adj.
See also: Flowers
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cleistogamy - the production of small nonopening self-pollinating flowers
self-pollination - fertilization by transfer of pollen from the anthers to the stigma of the same flower
References in periodicals archive ?
The Mesoamerican subtribe Thyrsantheminae includes just 21 species, but contains nearly the full range of morphological and ecological diversity in the family: from fully open to tubular flowers, cleistogamy to chasmogamy, spreading stoloniferous plants to compact rosettes, and from habitats at sea level to 3,000 m in elevation.
Embryo sac development and cleistogamy in Commelinantia pringlei.
of complete cleistogamy are based on observations of only a few
pseudocleistogamy and Uphof's (1938) ecological cleistogamy.
1997), while cleistogamy is very common in the latter two families
documented cleistogamy in four genera of Malpighiaceae in 1908.
In species with cleistogamy, pollen grains from cleistogamous flowers contain starch, whereas those of chasmogamous flowers are devoid of it (Franchi et al.
Cleistogamy and chasmogamy in Bromus carinatus Hook.
Environmental control of cleistogamy in prairie grass (Bromus unioloides HBK).
Genus Floral sex/Breeding system References Tillandsia Hermaphrodite/ Xenogamy, Gilmartin & Brown, Cleistogamy 1985; Gardner, 1986 Hechtia, Dyckia, Unisexual, bisexual/ Benzing, 2000; Cottendorfia, Polygamomonoecy, monoecy, Lenz, 1995; Lindmania xenogamy Ramirez et al.
Instead, impatiens undergo cleistogamy - hidden fertilization - whereby flower buds that never open are self-fertilized internally, eventually forming seed capsules that, at the slightest touch, explode.
The balance between chasmogamy and cleistogamy in Collomia grandiflora (Polemoniaceae).