Malesherbia bracteata
Malesherbia bracteata is a perennial herb in Malesherbia (Passifloraceae). M. bracteata var. bracteata found in the deserts of the Andes and Coquimbo, while M. bracteata var. campanulata is only found around Embalse La Laguna. Malesherbia bracteata can grow up to 18mm and has white flowers. Variety campanulata differs from variety bracteata in terms of leaf shape, floral cup, and stipules. References 

bracteata