Gypsophila
Probably best known for the large cloud-like mass of tiny white or pink flowers on tangled stems. There are others, (in total around 100 species) but generally needing well-drained, preferably limy soil. Gypsophila, from the Greek, gypsos, meaning 'chalk/gypsum' and philos, 'loving', thus plants preferring to grow in a limy soil. Good for sunny borders in general, with more compact and spreading forms for a rock garden.