| Crataegus × grignonensis | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Genus: | Crataegus |
| Species: | C. × grignonensis
|
| Binomial name | |
| Crataegus × grignonensis | |
Crataegus × grignonensis sometimes spelled grignoniensis, is a hybrid hawthorn commonly known as "Grignon hawthorn". The hybrid originated as a seedling of Crataegus mexicana.[1] It is an excellent small ornamental tree up to about 5 meters in height, with deep red fruit that contain 1 or 2 pyrenes.[1]
Ancestry[edit]
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, France.[1] The male parent was thought at the time to be C. crus-galli, but that parentage produced C. x lavalleei, which looks quite different.[1] It is thought to be more likely that the pollen parent was C. monogyna.[1]
Taxonomy[edit]
The Latin binomial Crataegus × grignonensis (or equivalently Crataegus grignonensis) was published in 1890 on the basis of a description written by Pierre Mouillefert,[2] who was the professor of sylviculture at l'École nationale d'Agriculture de Grignon.
References[edit]
- ^ a b c d e Phipps, J.B.; O’Kennon, R.J.; Lance, R.W. (2003). Hawthorns and medlars. Cambridge, U.K.: Royal Horticultural Society. ISBN 0881925918.
- ^ "Miscellen (page 248)", Wiener Illustrirte Garten-Zeitung: 68–506, 1890