Silene uniflora - Perennial herb. Full sun.  30 cms height, 25 cms width. Natural habitats include coastal areas, river edges and lakesides. Mound forming growth habit of the grey green leaves. . White unusual flowers, held over a long flowering period. The flowers have an inflated calyx, giving them a round appearance. The roots contain saponin, and can be used to make soap. Well drained soil, preferring sandy and gravelly soils. An edible plant, being especially popular in Spain and Crete. The leaves are eaten raw or cooked. The flowers are also edible.