Among the worst invasive species that are present at Hidden Springs wetlands are purple loosestrife ( Lythrum salicaria ), mis-named Canada thistle ( Cirsium arvense ), and reed canarygrass ( Phalaris arundinacea ). (boisefrontnature.com)
Large patches of purple-flowered Canada thistle ( Cirsium arvense ) grow at the edge of the marsh, interspersed with tall stalks of poison-hemlock ( Conium maculatum ) covered with small white flowers. (boisefrontnature.com)
13) Acute toxicity, androgenic, gonadotropic, estrogenic and aphrodisiac effect of the whole medical plant Lithospermum aver arvense and its seeds was investigated on white rats and white mice. (comparewords.com)
Species1
The other species of Lithospermum in the Chicago Region have showy yellow flowers arranged in terminal inflorescences, and the sepals are much shorter than the petals. (asu.edu)