[Butterweeds and Groundsels East of the Cascade Mts.]

Tall Butterweed, Tall Ragwort, Butterweed Groundsel

Senecio serra var. serra

Inflorescence of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Inflorescence of tall butterweed as seen at the northeastern base of Steptoe Butte in eastern Washington..................June 22, 2009.


Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serraPhoto at right of tall butterweed from the Chief Joseph Trail, Wallowa-Whitman N. F.........July 27, 1997.
Characteristics:

Tall butterweed is an erect, multi-stemmed plant, from 50 to 200 cm high with glabrous herbage. The leaves have serrate margins. The blades of the lower leaves are oblanceolate with short petioles. The upper leaves are roughly the same size as the lower leaves, lanceolate to lance-elliptic in shape,tapering slowly to the petiole. The leaves range from 7-15 cm long and 1-4 cm wide.

Many flower heads may be found at the top of the plant. The central disc flowers (about 3-7 mm wide) are yellow, as are the 5-8 ray flowers (each of which is about 7 mm long) which ring the disc. The involucre is 6-8 mm high with 8-13 individual bracts. The bracts are black-tipped.


Habitat:

Tall butterweed is found in moist meadows, and along streambanks, and in open places.


Range:

Tall butterweed is widespread from the east base of the Cascades east to western Montana and south to California and Colorado.

 


Involucral bracts of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Close-up of the involucral bracts of tall butterweed as seen at the northeastern base of Steptoe Butte in eastern Washington..................June 22, 2009.

Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Tall butterweed on basalt talus slopes next to a small lake along the West Fork Naneum Creek in the Colockum State Wildlife Area....................July 25, 2009.

Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Tall butterweed on basalt talus slopes next to a small lake along the West Fork Naneum Creek in the Colockum State Wildlife Area....................July 25, 2009.

Budding inflorescence of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

The photo above shows a close-up of the budding inflorescence of tall butterweed as seen along Forest Road #40 near Sunset Point in the Umatilla National Forest of southeastern Washington.........................June 25, 2007.

Stem leaf of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

The photo above shows a close-up stem leaf of tall butterweed as seen along Forest Road #40 near Sunset Point in the Umatilla National Forest of southeastern Washington.........................June 25, 2007.

Stem leaf of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Stem leaf of tall butterweed as seen at the northeastern base of Steptoe Butte in eastern Washington..................June 22, 2009.

Stem leaf of Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

The another view of a stem leaf of tall butterweed as seen from Klick's K-Bar-L Ranch, along the North Fork of the Sun River in Montana............August 4, 2000.

Tall Butterweed, Tall Ragwort, Butterweed Groundsel: Senecio serra var. serra

Tall butterweed as seen from the Chief Joseph Trail, Wallowa-Whitman National Forest............July 27, 1997.

Paul Slichter