A very useful and pretty group of plants, many of them excellent ground cover, others more upright in form. Flowers are reasonably large, in whorls around the stem Colours ranging from white, pink and yellow. Attractive in flower and often equally attractive in foliage. Good for a shady part of the garden, but some of the ground cover forms will take a sunny spot, especially as they can weave and hide under other perennials and shrubs.