[Members of the Sunflower Family with Discoid Flower Heads Found East of the Cascade Mountains of Oregon and Washington]

Western Boneset, Western Eupatorium, Western Snakeroot

Ageratina occidentalis

Synonym: Eupatorium occidentale

Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale)

The photo above shows a portion of a cluster of western snakeroot as seen along the access road to Cloud Cap Inn on the northeastern slopes of Mt, Hood in the Oregon Cascades..........August 2, 2007.
Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale) The photo at right shows a close-up of the inflorescence and triangular leaves of the upper stem of western snakeroot as seen along the access road to Cloud Cap Inn on the northeastern slopes of Mt, Hood in the Oregon Cascades.........August 2, 2007.
Characteristics:

Western snakeroot is a rhizomatous perennial. It has several stems which rise from a woody base. The plant may arise to a height of 70 cm. The leaves are alternate, and occasionally opposite. The leaves are petiolate, serrate, and are narrowly to widely deltoid, or deltoid ovate. The flower heads are small, clustered primarily at the end of the stems. The flowers are pink, reddish-purple, or sometimes white. Nine to twentyone disc flowers are found in each head.

Habitat:

Western snakeroot is a plant of dry, rocky areas.

Range:

Western snakeroot is found from central Washington south along the east side of the Cascades to California, and eastward into Idaho and Utah.

 

Flower head and upper stem leaves of Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale) -Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale) - Flower heads and upper stem leaves of Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale)

Western boneset as seen along the Canyon Mountain Trail, Strawberry Mountain Wilderness........August 19, 2011.

Flower heads of Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale)

The photo above shows a close-up of the flower heads of western snakeroot as seen along the access road to Cloud Cap Inn on the northeastern slopes of Mt, Hood in the Oregon Cascades..........August 2, 2007.

Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale) - Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale) - Western Boneset, Western Eupatorium, Western Snakeroot: Ageratina occidentalis (Synonym: Eupatorium occidentale)

Western snakeroot as seen along the Slide Basin Trail #372, Strawberry Mountain Wilderness..........August 11, 2015.
Paul Slichter