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Of or relating to a flower that is pollinated after it opens.

[Greek khasma, an opening + -gamous.]

chas·mog′a·my n.
References in periodicals archive ?
Flowers are of two main types: chasmogamous flowers from the upper nodes, and cleistogamous flowers from nodes near or below ground level (Hunt, 1975).
caroliniensis are known to produce both chasmogamous (outcrossed) and cleistogamous (small, self-fertilized) flowers (Long & Uttal 1962; Long & Lakela 1978).
She is studying the effect of prescribed fire and invasive plant removal on the demography, population genetic structure, and breeding system of Viola conspersa, a state-listed violet that produces both chasmogamous (open) and cleistogamous (closed) flowers.
Germination requirements of aerial chasmogamous florets and seeds of Nassella leucotricha (Poaceac).
linearis in many locations, and is unique in the genus for producing salmon to yellow chasmogamous flowers as well as minute whitish cleistogamous flowers.
Development of cleistogamous and chasmogamous flowers in Lamium amplexicaule (Labiatae)--Example of heteroblastic inflorescence development.
Plants dimorphic: a vernal stage with reduced or no leaves and chasmogamous capitula, and an autumnal stage with fully developed leaves and cleistogamous capitula Leibnitzia 38b.
Florets isomorphic, bisexual, chasmogamous or cleistogamous; chasmogamous florets with corolla ligulate, limb deeply five-lobed, with one deeper split and unilateral lobes; cleistogamous florets with corolla pseudoligulate, tubular, four- to five-lobed, with one deeper slit but without an expanded lip; anther apical appendages rounded to apiculate, tails slightly to long-papillose; style bilobed, branches dorsally papillose.
Herbs perennial, acaulescent, scapose, with plant dimorphism: a vernal (spring) stage with reduced or no leaves and chasmogamous capitula, and an autumnal (summer and fall) stage with fully developed leaves and cleistogamous capitula.
In species with cleistogamy, pollen grains from cleistogamous flowers contain starch, whereas those of chasmogamous flowers are devoid of it (Franchi et al.