either of two species of herbaceous plants of the genus Gypsophila, of the pink family (Caryophyllaceae), having profuse small blossoms. Both G. elegans, an annual, and G. paniculata, a perennial, are cultivated for their fine misty effect in rock gardens and flower borders and in floral arrangements. They are native to Eurasia.

Annual baby's breath, up to 50 cm (20 inches) tall, is much branched, with narrow bluish green leaves. It is widely planted, especially the varieties such as ‘Carminea,' with deep rose-red flowers; ‘Grandiflora Alba,' with large white flowers; and ‘Rosea,' with rose-pink flowers.

Perennial baby's breath, up to 100 cm tall, is similar in appearance to G. elegans but has a stout storage rootstock and white to pinkish flowers. Popular varieties include ‘Compacta,' dense growing; ‘Flore Pleno,' with double flowers; and ‘Grandiflora,' with larger flowers.