lady's smock, in botany, a genus of the tetradynamia filiqua class. The pod opens with a spring, and the valves are revoluted: The stigma is entire; and the calyx gapes a little. There are fifteen species, seven of which are natives of Britain, viz. the bellidifolia, or daisy-leaved lady's-smock; the petraea, or mountain lady's-smock; the pratensis, or common lady's-smock; the amara, bitter crested, or lady's-smock; the impatiens, or impatient lady's-smock; the paviflora, or small flowered lady's-smock; and the hirtula, or hairy lady's-smock.