Vigorous but neat perennials, very hardy, and producing myriads of flowers, mostly small, and of a pale pinkish hue. They are best suited for rocky or sandy ground, or even old ruins, or any position where they will not be smothered by coarser vegetation. Similar in character is the pretty little Tunica saxifraga, which grows on the tops of old walls, etc., in Southern Europe, and will thrive on bare places on the level ground with us.