This species is huge, reaching 5 feet. Features bold, blue/green leaves and yellow flowers. The seeds are a favorite of the goldfinch. This South-central U.S. native tolerates light shade and heat, and some drought. Grows well in moist to dry soils in full sun.
For more information on this plant, visit the USDA PLANTS Database: http://plants.usda.gov/java/profile?symbol=RUMA3