Rush skeletonweed is a native of Asia and the Mediterranean region. It is a herbaceous perennial that reproduces by seed and by an extensive root system. The wiry stems of the plant can grow from 1 to 4 feet tall. Stems are hairy from the ground up to 4 to 6 inches high with smooth stems above. These brown hairs are a distinguishing characteristic. Stems and leaves contain a milky latex if cut. The leaves on stems are sharply toothed. The hairless basal leaves are 2 to 5 inches long and 1/2 to 2 inches wide. Flowers are yellow and occur from mid-July to when frost occurs. Flower heads are less than 1 inch in diameter and consist of 9 to 12 flowers, although they may appear to be one. A vigorous mature plant can produce up to 1,500 flowers capable of distributing 20,000 seeds. Plants usually overwinter as rosettes which closely resemble common dandelion.