Sorbus esserteauana published the epithet was written as "esserteauiana". However, according to ICBN (Vienna Code) Art. 60.11 and 60C.1(c), the connecting vowel "-i-" in it is unnecessary and thus must be deleted. Sorbus esserteauana Sorbus esserteauana, commonly known as Esserteau's rowan, is a species of rowan. It is a small tree, typically tall growing in mountain thickets and cliffs. It is an endemic species to China, being only found in western Sichuan. It has small white flowers and small red berries that are actually a pome fruit. Unlike all other species of "Sorbus", the fruit are hard and inedible to humans, but
Fraxinus excelsior narrow crown. The bark is smooth and pale grey on young trees, becoming thick and vertically fissured on old trees. The shoots are stout, greenish-grey, with jet black buds (which distinguish it from most other ash species, which have grey or brown buds). The leaves are opposite, long, pinnately compound, with 7–13 leaflets with coarsely serrated margins, elliptic to narrowly elliptic, long and broad and sessile on the leaf rachis. There are no stipules. These features distinguish ash from mountain ash ("Sorbus aucuparia") in which the leaves are alternate with paired stipules. The leaves are often among the last to