Sorbus is a genus of over 100 species of trees and shrubs in the rose family, Rosaceae.

[1][2] Sorbus is not closely related to the true ash trees which belong to the genus Fraxinus, although the leaves are superficially similar.

As treated in its broad sense, the genus was traditionally divided into several subgenera, however, this treatment was found to be paraphyletic, comprising two disparate lineages within the Malinae subtribe.

Additionally, it was recognised that despite a comparably large genetic distance between them, the genera Sorbus (sensu stricto), Aria, Chamaemespilus and Torminalis have interbred extensively, in various combinations, which lead to the recognition of an additional five intergeneric hybrid genera.

The following, of mixed or uncertain parentage, have gained the Royal Horticultural Society's Award of Garden Merit:[3]