Up to 6 ft. tall, mostly unbranched except near the top where several flower stems form; exudes white, milky sap when broken
Alternate; upper leaves are smaller and fewer than lower leaves; leaf bases clasp the stem; exude white, milky sap when broken
Edges (margins) smooth to deeply lobed and spiny
Yellow; less than 2 in. wide; base of flower is vase shaped; flower base and stalk usually covered with stiff, sticky hairs
Creeping root system
Grows best in moist, fertile soils; often infests crop fields, gardens, waste areas and ditch banks; known to occur in Elko, Humboldt, Lincoln, Storey and White Pine counties
Perennial; reproduces by seed and roots; seed is wind-dispersed
Apply 2,4-D, picloram, clopyralid or aminopyralid to actively growing plants before bud stage