This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Small slender rigid herbs resembling small Pinks. They differ from Dianthus in the few-nerved calyx. About ten species are known, all inhabiting the Mediterranean region; but only one species is at all generally cultivated. The name is from the Latin, signifying a jacket or covering.
1. T. Saxifraga, syn. Gypsophila Saxifraga. - A dwarf trailing plant with slender wiry stems and linear rigid leaves. The bright pink flowers are small, but being produced in copious panicles they are very effective. It is a native of the Pyrenees and Alps, and continues blooming all the Summer.