European Mountain Ash

About European Mountain Ash in Alberta

European Mountain Ash is an introduced Alberta tree best known as a long-established ornamental in cities and towns rather than as a native wild species. It is widely planted in urban yards, parks, boulevards, and civic landscapes, especially for its spring flower clusters, manageable size, and dense orange-red fruit. In Alberta it also has a second story as a spreading non-native, with local establishment in some natural areas. For ARA purposes, it matters mainly as part of Alberta's planted urban history and urban-natural transition zones, not as part of the province's original forest flora.

Identification: Leaves are alternate and pinnately compound, usually with 11-17 leaflets and sometimes more. The leaflets are oblong to lance-shaped, finely serrated, and arranged in a neat feathered pattern that gives the tree a fine-textured look.

Alberta range and habitat: European Mountain Ash is not a native Alberta tree. Outside planting, it should be treated as escaped or naturalized rather than wild in the native sense.