Perennial herb; stems several with numerous branches (bushy appearance), slender, 3-5 dm tall, white, glabrous to above the middle, puberulent near the top; basal leaves absent; lower stem leaves narrowly lanceolate to linear, up to 4 cm long, entire or with a few shallow teeth; upper stem leaves linear and mostly entire, usually less than 2.5 cm long; herbage pubescent with barbed hairs (stick to cloth); flowers solitary at the ends of slender branches; petals 10, bright yellow, 10-15 mm long; capsules narrowly cylindrical, 5-10 mm long; seeds lenticular, narrowly winged. Flowers open in late afternoon, July through August.