Sow thistle (Smooth sow thistle, Annual sow thistle, Hare's colwort, Hare's this)
Annual, lactiferous, seed-propagated weed with strong, cone-shaped taproot. S. oleraceus produces latex and is a preferred feed for birds, chicken and geese.
Flower heads light yellow to greenish yellow (Sonchus arvensis: intensive yellow). Leaves and stems contain milky sap. Soft, floppy, shiny, greasy, bluegreen leaves.
Round, often flatly sinuate in front, light green, entire, petiolate.
Erect, thick, ramified, up to 80 cm-100 cm (2.62 - 3.28 ft) high.
First leaves nearly circular, with fine teeth; following leaves runcinate-pinnatifid or undivided, soft, blue-green, enclosing the stalk sagittately, prickly dentate.