I bought a plant at a Walmart in Raleigh, NC, a couple days ago. It has lovely flowers about 2 inches across. Each flower has an outside group of dusty rose-colored petals surrounding a smaller inner group of petals of a lighter hue, in the middle of which is a thumb-sized cluster of yellow stamens. The leaves appear in groups of 3, with each leaf being no more than 1 inch long and delicate, almost limp, as opposed to leathery or stout. Each leaf has a generally triangular appearance with scalloped edges making it clover-shaped overall. Tha plant is about 10-12 inches high. It was labelled "sun perennial". Any thoughts on ID?