[Tarweeds East of the Cascade Mts. of Oregon and Washington]

Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed

Madia gracilis

Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis

Flower head of Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

The photo above shows an above view of a flower head of slender tarweed. Notice the smal number of disk flowers as well as the tri-lobed ray flowers. Except where noted, the photos on this page were all taken at a rock quarry at about 4100' atop the ridge dividing the Dairy Creek and Cougar Creek drainages at the southeastern corner of Mt. Adams.......July 11, 2005.

Involucral bracts of Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis

Close-up of the involucre of slender tarweed as seen along the Umatilla Rim Trail #3080 on the northwestern shoulder of High Ridge, Umatilla National Forest.........July 24, 2012.

Inflorescence of Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis) - Inflorescence of Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

Close-ups of the inflorescence of slender tarweed as seen along the first mile of the Lake Creek Trail #378, Strawberry Mountain Wilderness..........July 19, 2013.

Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis) - Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis) - Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

Slender tarweed as seen (left and center) on lithosol soils at the junction of forest service roads 35 and 3517 on Table Mountain, Wenatchee National Forest..........June 4, 2013. The photo at right shows slender tarweed as seen in a ditch at the entrance to the Ochoco Forest Camp, Ochoco National Forest........July 13, 2017.

Inflorescence of Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis) - Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

A close-up of the inflroescence and stem leaves of slender tarweed as seen on balds along the Steins Pillar Trail #837, Ochoco National Forest..........June 26, 2017.

Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis) - Common Tarweed, Grassy Tarplant, Grassy Tarweed, Slender Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

Slender tarweed fading out of bloom along the Tenderfoot Trail #1819 on the north side of Big Sheep Creek about one-quarter mile west of the trailhead, Eagle Cap Wilderness.......August 12, 2018.

Involucral bracts of Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

The photo above shows a good close-up view of the ovoid or urn-shaped heads. Note the gland-tipped hairs which are primarily found within the inflorescence or at most, on the upper portion of the plant. Photographed on the Elowah Falls Trail in the western Columbia River Gorge.......July 14, 2006.

Inflorescence of Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

The upper stem and stem leaf of slender tarweed. Notice the many spreading hairs, some of which are capped with brownish glands.

Stem leaf of Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)

The photo above shows a stem leaf of slender tarweed as seen along the Elowah Falls Trail in the western Columbia River Gorge.........July 14, 2006.


Flower head of Grassy Tarweed, Grassy Tarplant, Slender Tarweed, Common Tarweed, Gum-weed: Madia gracilis (Synonyms: Madia dissitiflora, Madia gracilis ssp. gracilis)


Paul Slichter