X-Nico

unusual facts about International Code of Botanical Nomenclature



Crataegus × macrocarpa

Under the International Code of Botanical Nomenclature the name C. × macrocarpa covers all intermediate forms between the two parent species, including backcrosses.

Crataegus × media

Under the International Code of Botanical Nomenclature the name C. × media covers all intermediate forms between the two parent species, including backcrosses.

Magnolia × wieseneri

However, Élie-Abel Carrière had named a specimen six months earlier in 1890 after a Mr Wiesener, who had purchased a plant from a Japanese horticulturist at the Trocadéro at the same time as the Exposition, and hence the French botanist's name was preserved under International Code of Botanical Nomenclature naming rules.


see also