Sonchus arvensis ssp. uliginosus Taxonomy: Asteraceae, Sonchus Category: Dicot Scientific NameSonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman FamilyAsteraceaeCommon Names field sow-thistle, marsh sow thistle, wet ground sow thistle Eastern WashingtonEuropeanConservation StatusNotes Click on any image to enlarge it. S edge of Valley, WA – Stevens Co. – 8/5/2009S edge of Valley, WA – Stevens Co. – 8/5/2009S edge of Valley, WA – Stevens Co. – 8/5/2009S edge of Valley, WA – Stevens Co. – 8/5/2009S edge of Valley, WA – Stevens Co. – 8/5/2009