Lady's Mantle (Alchemilla mollis) is one of my favorite perennials because of the way rain and dew drops collect on the leaves. The flowers are rather insignificant but they really do look very nice in arrangements. [photo by Rosemary Beck]
This picture from The Herb Companion shows lady's mantle in bloom around the edge of a rock garden and pond. There is a lot more information about this prolific herb here. Now is a good time to buy a clump or two for your garden since June is the month for perennials. You'll be so glad you did.