This genus includes the rowans (mountain ash) and whitebeams, and this present group consists of the rowans, technically known as the Aucuparia section. These are small, graceful trees or shrubs with attractive foliage, which in the rowans is usually pinnate, toothed or lobed and provides good autumn colour. In spring or early summer they produce dense corymbs of frothy white or pinkish flowers, which are followed by fruit varying in colour depending on the species. Many species are apomictic, i.e. self-fertile, and so seedlings are clones of the parent. For this reason there are many species, groups of which can be similar to one another.

Sorbus aff. rehderiana is a new species, not yet named, but similar to Sorbus rehderiana. It has quite glossy, deep green leaves with about 8 pairs of leaflets, which become bright red in autumn. At that time as the leaves change colour, the abundant fruit change from red to rich pink, and in some specimens they become paler, even white.