The Deptford pink belongs to Caryophyllaceae (the Carnation family). It is an annual herb that is native to Europe. In Japan, naturalization was confirmed in Nagano Prefecture in 1967, and it has now spread from Honshu to Shikoku and Kyushu. This herb grows on roadsides and is about 50 cm high. The basal leaves are spatulate and have petioles, and the cauline leaves are linear and opposite. The pink flowers come on the shoot apex from June to August. The petals are thin and the tips are irregularly cut, and small white spots are conspicuous. The English name comes from the fact that it was often found in the suburb of London, Deptford.