Silene Acaulis, also commonly known as cushion pink or moss campion, is a plant species that belongs to the Caryophyllaceae family. It is a low-growing perennial herbaceous plant that is native to areas in the northern hemisphere and can be found in rocky alpine and arctic environments. There are a few different synonyms for Silene Acaulis, including the scientific name Silene exscapa, as well as the common names mountain sandwort and rock soapwort. Despite its low-lying stature, cushion pink is a hardy and resilient plant that has adapted to survive in harsh and unforgiving environments. This makes it a popular choice for rock gardens and other landscape designs.