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