Empetrum rubrum, known as red crowberry or diddle-dee (Chilean Spanish: Murtilla de Magallanes), is a species of plant in the Ericaceae family with a distributional range in Chile from Talca (35°S) to Cape Horn (55°S); in areas of adjacent Argentina; in the Falkland Islands; and in Tristan da Cunha.
Nearly all of Santa Clara is abundant in the introduced Rubus ulmifolius, Aristotelia chilensis, Ugni molinae, Lantana camara and Lonicera japonica.