The photo above shows false agoseris as seen atop the Columbia Hills several miles north of The Dalles, OR.........April 7, 2007.
False agoseris is a perennial to 30 cm in height. The numerous leaves are basal, narrow (to 1 cm wide) and up to 40 cm long. The margins are often crisped or wavy, and often with a thin white striping along the edge.
The flower heads are solitary and dandelion-like. The bracts are a little less than equal in size, lanceolate to linear-lanceolate in shape, the upper end tapering gradually to a point. The bracts typically have a dark midrib, and may have lighter striping on both sides of this midrib. The fruiting head is dandelion-like.
False agoseris is found in dry open places in the lowlands and into the foothills.
False agoseris may be found east of the Cascades from southern British Columbia south through central Washington and Oregon to northern California, and eastward to western Montana and northern Utah.
In the Columbia River Gorge, false agoseris may be found east of approximately the Little White Salmon River between the elevations of 100'-3000'.
-The photo at left shows a close-up view from above of the flower head of false agoseris as seen from Catherine Creek, Columbia River Gorge..........April 9, 2006. This species is similar to the common dandelion in having only ray flowers present. The photo at right shows a flower head of false agoseris as seen in Rowena Dell between Memaloose and Tom McCall Nature Preserve.........April 5, 2016.
The photo above shows a close-up of the involucral bracts and undersides of the ray flowers of false agoseris as seen from Catherine Creek, Columbia River Gorge...........April 9, 2006. Note the tangled white hairs on the outside of the involucral bracts and lower, outer surfaces of the rays. Note also the dark line running the length of the mid-section of the bracts and the burnt orange stripe running the length of the underside of each ray.