Gypsophila are annual and perennial herbs often growing from a thick taproot or a branching caudex, sometimes with rhizomes. The stems are usually erect and branching or sprawling, or in a few species prostrate along the ground. The leaves are variable in shape. The inflorescence is usually a cyme or a thyrse, branching intricately. Each small flower has a cup-like calyx of white-edged green sepals containing five petals in shades of white or pink. The fruit is a rounded or oval capsule opening at valves. It contains several brown or black seeds which are often shaped like a kidney or a snail shell.