Prickly Russian Thistle, Russian Thistle, Tumbleweed
Salsola tragus
Synonyms: Salsola australis, Salsola iberica, Salsola kali, Salsola kali ssp. iberica, Salsola kali ssp. kali, Salsola kali ssp. ruthenica, Salsola kali ssp. tenuifolia, Salsola kali ssp. tragus, Salsola kali var. tenuifolia, Salsola pestifer, Salsola ruthenica

Russian thistle blooming on the gravelled horse trailer parking area at Horn Rapids Park, Benton County, Washington........October 2, 2012.

The photo above shows russian thistle as seen along Washington Highway SR14 at the junction with the Dalles Mt. Road........October 7, 2006.
Paul Slichter