That's been the case this year with Canada thistle. Perennial sowthistle is a statewide noxious weed. Infestations cover about 150,000 acres. About half of that is noncrop areas, primarily wet, marsh sites, Wrage said.
Stems are smooth.
Leaves are dandelion shaped, with spine-tipped edges. But no spines are found on the midrib. It has a creeping root system. All parts have milky, white juice. Wrage said weed watchers need to check for which kind of sowthistle they have.