This Korean or Alder-leaf Mountain-Ash from central China to Korea and Japan is different than most other Sorbus in that it has simple and not compound pinnate leaves. The leaves do look like alder or beech or hornbeam leaves that get a good yellow to orange or golden brown fall color. The handsome gray, smooth older bark looks like beech. It bears the white flattish corymbs of 6 to 10 flowers in each cluster in late spring. The fruit is a pome (apple-like fruit) about 3/8th to 5/8th inches long that are bloomy, speckled, and pink-red to orange-red in color in September-October and persisting longer. This species is a little more tolerant of heat than most other mountain-ash species, but it is still susceptible to borers from heat and drought stress. It does not do well with harsh conditions or pollution. It grows about 1.5 feet/year or a little more. I've heard of it for many years, but I have only seen it once in my life so far, at the Morris Arboretum in Philadelphia, PA in Zone 6b.

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