Perennial sowthistle stems are erect, stout, smooth, and unbranched except at the top. The clasping leaves are alternate and light green, and slightly toothed. Perennial sowthistle can grow anywhere from 4 to 6 feet tall, reproducing by seeds and horizontal roots. The flowers are large and yellow, resembling a dandelion.
sow thistle, noxious weedsIMG_1293