[Goldenrods: The Genera Euthamia and Solidago in the Columbia River Gorge of Oregon and Washington]

Western Goldenrod, Western Goldentop

Euthamia occidentalis

Synonyms: Euthamia californica, Euthamia linearifolia, Solidago occidentalis

The photo at left shows a close-up of the flower heads of western goldenrod as seen along a small creek several miles west of Biggs, OR in the eastern Columbia River Gorge..........October 7, 2006. The photo at right shows the inflorescence of western goldenrod as observed on the shoreline of Pierce Island, Columbia River......October 7, 2021.

The photo at right shows the upper stems of western goldenrod. Note that it is well branched and that the inflorescence is relatively flat-topped.

Characteristics:

Western goldenrod is a perennial wildflower with erect, much-branched stems arising from 50-200 cm high. The branches are glabrous (lacking hairs) and generally ascend or are nearly upright. The numerous leaves are sessile and narrowly linear in outline with 3 nerves or veins. They measure from 6-10 cm long and are at most 1 cm wide. The lower leaves are deciduous by the time plants bloom.

The inflorescence is a leafy, compact to open set of corymbiform panicles. The outline as viewed from the side appears slightly rounded to flat-topped. The yellowish or pale green involucre of individual flowers is about 4 mm high and somewhat glandular. The involucral bracts are narrow with acute tips. The 15-30 ray flowers are yellow in color and measure 1.5-2.5 mm long. They surround a narrow yellow disk which consists of fewer disk flowers.

Western goldenrod is probably one of the easier goldenrods to identify in the Gorge. Key characteristics include the much branched stems with the flat-topped inflorescence and narrow, entire-margined leaves.

Habitat:

Western goldenrod may be found in damp ground along rivers and streams in the lower valleys and plains.

Range:

Western goldenrod may be found from southern British Columbia south to California and east to Alberta and south to Nebraska and New Mexico.

In the Columbia River Gorge it is found between the elevations of 0'-200' across the length of the Gorge.

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These 3 photos show close-ups of the inflorescence of western goldenrod as aseen along the old highway about one mile east of Celilo, OR..........September 2007.

Stem leaf of Western Goldenrod, Western Goldentop: Euthamia occidentalis (Synonyms: Euthamia californica, Euthamia linearifolia, Solidago occidentalis)

The photo above shows the long, linear leaves of western goldenrod.

Western goldenrod beginning to bloom at left on the shoreline of Mirror Lake, Rooster Rock State Park...........October 8, 2012. Western goldenrod blooming at right in Eightmile Creek atop the waterfall uphill from the Crawford Oaks Trailhead, Columbia Hills State Park........October 16, 2017.

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Western gloldenrod blooming along the Columbia River shoreline on the south side of the Washougal Dike, Columbia River Gorge.........August 31, 2015.

Western Goldenrod, Western Goldentop: Euthamia occidentalis (Synonyms: Euthamia californica, Euthamia linearifolia, Solidago occidentalis)

A close-up of the inflorescence of western goldenrod from the mouth of the Deschutes River, Columbia River Gorge............September 3, 2000.

Paul Slichter