How to use greges in a sentence? Find typical usage patterns (collocations)/phrases/context for "greges" and check conjugation/comparative form for "greges". Mastering all the usages of "greges" from sentence examples published by news publications.
Hybrids between a grex and a species/nothospecies are named as greges, but this is not permitted if the nothospecies parent has the same parentage as the grex parent. That situation is a back-cross, and the nothospecies name is applied to the progeny.
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In 2008, the genus Sophronitis was merged into Cattleya, making such nothogenera as Potinara, Sophrolaeliocattleya and Sophrocattleya no longer current, but only of historical interest. At the same time, several species of Cattleya which had been widely used in hybridization were moved into the new genus Guarianthe. Two species of Brassavola, B. digbyana and B. glauca had also been moved into the new genus Rhyncholaelia earlier in the decade. As a result, greges which were once classified in Potinara are now found in several genera and nothogenera.
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The concept of grex and nothospecies are similar, but not equivalent. While greges are only used within the orchid family, nothospecies are used for any plant (including orchids). Furthermore, a grex and nothospecies differ in that a grex and a nothospecies can have the same parentage, but are not equivalent because the nothospecies includes back- crosses and the grex does not. They can even have the same epithet, distinguished by typography (see botanical name for explanation of epithets), although since January 2010 it is not permitted to publish such grex names if the nothospecies name already exists.
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Because many interspecific (and even intergeneric) barriers to hybridization in the Orchidaceae are maintained in nature only by pollinator behavior, it is easy to produce complex interspecific and even intergeneric hybrid orchid seeds: all it takes is a human motivated to use a toothpick, and proper care of the mother plant as it develops a seed pod. Germinating the seeds and growing them to maturity is more difficult, however. When a hybrid cross is made, all of the seedlings grown from the resulting seed pod are considered to be in the same grex. Any additional plants produced from the hybridization of the same two parents (members of the same species or greges as the original parents) also belong to the grex.
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