''Crataegus'' × ''grignonensis'' sometimes spelled ''grignoniensis'', is a hybrid
hawthorn
Hawthorn or Hawthorns may refer to:
Plants
* '' Crataegus'' (hawthorn), a large genus of shrubs and trees in the family Rosaceae
* ''Rhaphiolepis'' (hawthorn), a genus of about 15 species of evergreen shrubs and small trees in the family Rosace ...
commonly known as "Grignon hawthorn". The
hybrid
Hybrid may refer to:
Science
* Hybrid (biology), an offspring resulting from cross-breeding
** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species
** Hybridity, the property of a hybrid plant which is a union of two dif ...
originated as a seedling of ''
Crataegus mexicana''.
It is an excellent small ornamental tree up to about 5 meters in height, with deep red fruit that contain 1 or 2
pyrenes
Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is . This yellow solid is the smallest peri-fused PAH (one where the rings are fused through mor ...
.
[
]
Ancestry
An atypical seedling from ''C. mexicana'' (which is often referred to by the illegitimate name ''Crataegus pubescens'' Steud.) appeared in 1873 among plants being cultivated at the Arboretum de Grignon
The Arboretum de Grignon (0.8 hectares) is an arboretum located within the campus of the ''Institut des sciences et industries du vivant et de l'environnement'' (AgroParisTech) on Avenue Lucien Brétignières, Thiverval-Grignon, Yvelines, Île-de-F ...
, France.[ The male parent was thought at the time to be ''C. crus-galli'', but that parentage produced ''C.'' x ''lavalleei'', which looks quite different.][ It is thought to be more likely that the pollen parent was ''C. monogyna''.][
]
Taxonomy
The Latin binomial ''Crataegus'' × ''grignonensis'' (or equivalently ''Crataegus grignonensis'') was published in 1890 on the basis of a description written by Pierre Mouillefert,
References
grignonensis
{{Crataegus-stub