False agoseris as seen at Brooks Memorial State Park near Satus Pass, Washington.........May 11, 2014.
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.
The photo above 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.
-Close-up images of the involucral bracts and undersides of the ray flowers as well as a dorsal view 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.
-False agoseris as seen on fairly natural grassland slopes above the east bank of the John Day River about one-half mile downstream of Oregon Highway 206 in Cottonwood Canyon State Park.......April 9, 2016.
False agoseris as seen in scablands at the northeast corner of the junction of FS Roads #42 and #3010, southeast corner of Big Summit Prairie, Ochoco National Forest.........April 29, 2016.
-False agoseris in bud with slender-fruit desert parsley (Lomatium leptocarpum) and big-head clover (Trifolium macrocephalum) as seen (left) in scablands near the junction of FS Roads #42 and #300, Ochoco National Forest and adjacent BLM lands..........April 30, 2016. False agoseris (right) atop the Horse Heaven Hills, west of Richland, WA.........4/19/98.