This is Centaurea rothrockii, also known as Rothrocks Knapweed, Basketflower, Madrean Starthistle, and Basket Flower. This plant is considered a short lived perennial or a biennial. This plant attracts a wide variety of birds, bees, and butterflies. This plant likes to grow in full sun to light shade where it sports yellow and purple blossoms from late Spring through the middle of the Summer. USDA Hardiness Zones 3 to 8.