Which holly is referred to as Foster's Holly in scientific nomenclature?

Foster's Holly is known scientifically as Ilex x attenuata 'Fosteri'. This plant is a hybrid of Ilex cassine and Ilex opaca, and it is recognized for its attractive foliage and berries, which are characteristic of hollies. The 'Fosteri' cultivar is particularly valued for its dense growth habit and ability to thrive in various landscape applications, making it a popular choice among landscapers and horticulturists.

Ilex x attenuata, in its other forms, may not have the same characteristics that define the 'Fosteri' cultivar, while the other options listed pertain to completely different genera or species, such as Fraxinus (ash), Fagus (beech), and Ginkgo (a unique genus of trees). Therefore, Ilex x attenuata 'Fosteri' directly identifies this specific holly variety, highlighting its importance and recognition in the field of horticulture.