PLANTS FOR GROUND COVER : Page 548

Another valuable group of ground-cover plants are those whichare used to fill crevices between stepping-stones or between the flag-ging of paved terrace areas. This list is composed of small-floweringand foliage plants, both perennials and annuals, which are usuallyplanted in small soil spaces between the stones. Their greatest valueis to relieve the monotonous, bare effect of walks and terrace areas,to which so much interest would be added by a touch of colour, eitherin foliage or flowers, obtained through a proper planting of well-selected material included in this group. Many of these plants, if leftto themselves, will after the first two or three years spread rapidlyand will require much attention to keep them within the proper limits.Many paved walk and terrace areas are overplanted and consequentlya careful selection of a few of these plants is much better than anover-supply. The rock cress, sea thrift, stonecrop, and creeping phloxare types which are adapted to the small, refined spaces, while for