Tall perennial with yellow flowers which open in evening. Tolerates poor dry soil, drought conditions, and heat. Full sun. Native to RI. 3-5’ x 1-2’.
Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln, NE.