Arenaria serpyllifolia, commonly known as thyme-leaf sandwort, or thyme-leaved sandwort is an annual or biennial flowering plant in the pink and carnation family Caryophyllaceae that can be found from Nepal to Pakistan. It also have a wide distribution in the United Kingdom and southern Poland. It was introduced to Chile. The species is widespread in China.
The ants tend to pollinate Arenaria serpyllifolia.
The extract of the plant is used traditionally to treat kidney and bladder related problems, as well as cough and dysentery.