S. Marianus: annual or biennial; stems 2-3 feet high, slightly branched, nearly glabrous; leaves smooth, shining above and variegated by white veins, the lower ones deeply pinnatifid with broad very prickly lobes, the upper ones clasping the stem by prickly auricles scarcely decurrent; flower-heads large, drooping, solitary at the ends of the branches, with purple florets; involucral bracts, broad at the base, with a stiff, spreading, leafy appendage, ending in a long prickle; hairs of the pappus simple. - Waste places. Fl. June, July.