Terry flower - a feature of the structure of flowers associated with an increase in the number of petals (true terry) or with a change in the shape and size of the corolla of flowers collected in inflorescence (false terry).
It is a phenomenon of the growth of a corolla or nimbus perianth , which is associated with an increase in the number of petals . Quite often, terry is the result of turning into stamens petals (noted in peonies , roses, buttercups , pomegranates , etc.), pistils (noted in buttercups , rose flowers , some violets , clovers , terry petunias , etc.), much less often as a result increase in the number of circles in the simple perianth (double forms of tulips , lilies ), as a result of the splitting of the petals (noted in fuchsia ) or stamens (noted in some carnations ).
In the compositae , terry inflorescences are noted - the result of the transformation of the median bisexual flowers into reed, mostly fruitless ( dahlia , aster , chrysanthemum ), or peripheral reed into tubular.
The florism of flowers in floriculture is achieved by hybridization or changing the conditions of culture.
Terryness is very often accompanied by large changes in the organs of the flower itself: on the wall of the ovary, anthers ( primrose ) may appear on the stigma, ovules (fuchsia, roses) on the stamens, etc. Mostly incomplete terryiness occurs, less often - when all the stamens and pistils are transformed into petals (these flowers do not give seeds). When the terry in the petals (from the stamens) pollen is formed, which is located in the deeply located tissues, therefore, to the blooming of the flowers, it is destroyed. Being collected in time, this pollen is suitable for artificial pollination . If terry flowers remain functioning and pistils and stamens, the seeds are formed normally.
Literature
- Agricultural Encyclopedic Dictionary. - M .: Soviet encyclopedia. Editor-in-Chief: V.K. Month. 1989.
- Fedorov Al. A., Teratology and morphogenesis in plants, M. - L., 1958
- Zhukovsky P.M., Botany, 4th ed., M., 1964.
- Great Soviet Encyclopedia. - M .: Soviet encyclopedia. 1969-1978.