Perennial: Tolerates deer, rabbits and drought. Native to Mexico and south-central US. Narrow silvery green foliage holds flowers that open in the afternoon and bloom throughout the night. Good for borders, banks and slopes, mass plantings, woodland gardens, container, as a groundcover, and in rock gardens. Attracts butterflies. Bloom time: spring-summer. Bloom color: bright yellow. Height: 3-6 inches. Width: 15-18 inches. Exposure: sun. USDA Z5-9. PPAF