American Plum - Sorbus americana
More widespread in eastern Canada than in the United States, although it does grow south in the Appalachians, this is a Mountain-Ash of rocky sites, growing at high elevations. It is a small tree (30 feet) or often a shrub with a spreading crown, pale smooth bark and showy clusters of small white flowers. The pinnately compound leaves are 6-9 inches long and composed of 11-17 leaflets; these are pointed and toothed on the margins. Autumn color is bright yellow, and the small fruits (pomes) are orange to red and very numerous in showy clusters. They are bitter, and persist through the winter.