Oregon State University
Alphabetical List of Tree Common Names Alphabetical List of Tree Scientific Names Identification Key Mystery Tree

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Sitka mountain-ash (Sorbus sitchensis)

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  • Size: Grows upright, often many-branched but sometimes treelike, to 25' tall and 1' in diameter.

  • Leaves: Pinnately compound (7-11 leaflets per leaf), alternate, deciduous. Leaflets are roughly elliptical with serrated margins except near base where they are entire.

  • Fruit: Small, apple-like, in large clusters, red to red-orange in color.

  • Flowers: White and tiny, but in large, flat-topped, showy clusters of 100-200.

  • Twigs: Stout, alternate, olive colored, with large terminal buds.

  • Bark: Thin, smooth, grayish-green.

  • Distribution: Sun-loving and common in the mountains of the western U.S. and Canada.

For more information about these species see "Trees to Know in Oregon".

trees by common name trees by scientific name dichotomous key mystery tree

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