Pale yellow flowerheads, hairless leaves
Sow thistles (less commonly hare thistles or hare lettuces) are annual herbs in the genus Sonchus, after their Ancient Greek name. All are characterized by soft, somewhat irregularly lobed leaves that clasp the stem and, at least initially, form a basal rosette. The stem contains a milky sap. Flower heads are yellow and range in size from half to one inch in diameter; the florets are all of ray type. Sow thistles are common roadside plants,...
