[Mountain-ash: The Genus Sorbus in the Cascade Mountains of Oregon and Washington]

Cascade Mountain-ash, Rocky Mountain Mountain-ash

Sorbus scopulina var. scopulina

Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

The photo above shows cascade mountain-ash as seen at Snowking SnoPark along forest road #82.........May 28, 2005. Viewed from a distance, this shrub may be mistaken for blue elderberry.

Inflorescence of Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

The photo above shows a close-up side-view of the corymbose inflorescence of cascade mountain-ash as seen at Snowking SnoPark along forest road #82.........May 28, 2005.

Inflorescence of Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

The photo above shows a close-up of the corymbose inflorescence (as seen from directly overhead) of cascade mountain-ash as seen at Snowking SnoPark along forest road #82..........May 28, 2005.

Pinnately compound leaf of Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

The photo above shows a close-up of the pinnately compound leaf of cascade mountain-ash as seen at Snowking SnoPark along forest road #82..........May 28, 2005. Note the acute tips to the blades and leaflet margins which are serrate for much of their length.

Orange fruits of Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

The photo above shows a close-up of the fruits of Cascade mountain-ash as seen at SnowKing SnoPark along Road #82 on the southeastern approach to Mt. Adams..........August 25, 2005. The fruits are glossy and range from orange to scarlet red.

Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis) - Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis) - Cascade Mountain-ash, Rocky Mountain Mountain-ash: Sorbus scopulina var. cascadensis (Synonym: Sorbus cascadensis)

Close-ups of the fruits of cascade mountain-ash as seen along the Boundary Trail #1, Mount Saint Helens National Monument.........August 5, 2015. The upper left photo was taken about one-quarter mile east of Norway Pass while the other 4 photos were taken at the junction of the Lakes Trail #211.

Paul Slichter