Crataegus × macrocarpa
Encyclopedia
Crataegus × macrocarpa, is a hybrid between two species
of hawthorn
(Hawthorn), C. monogyna and C. rhipidophylla
, both in series
Crataegus. It is sometimes confounded with C. × media
, the hybrid between C. monogyna and C. laevigata.
Under the International Code of Botanical Nomenclature the name C. × macrocarpa covers all intermediate forms between the two parent species, including backcrosses
.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of hawthorn
Crataegus
Crataegus , commonly called hawthorn or thornapple, is a large genus of shrubs and trees in the rose family, Rosaceae, native to temperate regions of the Northern Hemisphere in Europe, Asia and North America. The name hawthorn was originally applied to the species native to northern Europe,...
(Hawthorn), C. monogyna and C. rhipidophylla
Crataegus rhipidophylla
Crataegus rhipidophylla is a species of hawthorn which occurs naturally from southern Scandinavia and the Baltic region to France, the Balkan Peninsula, Turkey, Caucasia, and Ukraine. It is poorly known as a landscape and garden plant, but seems to have potential for those uses. Two varieties are...
, both in series
Series (botany)
Series is a low-level taxonomic rank below that of section but above that of species.In botany, a series is a subdivision of a genus...
Crataegus. It is sometimes confounded with C. × media
Crataegus × media
Crataegus × media, is a hybrid between two species in the genus Crataegus , C. monogyna and C. laevigata, both in series Crataegus...
, the hybrid between C. monogyna and C. laevigata.
Under the International Code of Botanical Nomenclature the name C. × macrocarpa covers all intermediate forms between the two parent species, including backcrosses
Backcrossing
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, in order to achieve offspring with a genetic identity which is closer to that of the parent...
.