This is a herbaceous plant, also known as large leaf pennywort, dune water pennywort, coast pennywort, dollarweed, or ‘sombrerillo’, highly spread all over South America. In Argentina, this plant is frequently found in wet meadows, grasslands and dunes in Eastern and Southern area of the province of Buenos Aires. It grows all year long and flourishes during summertime. Plant has been used by the medical field in South America for many years, mainly against skin erythemas, psoriasis, dermal ulcers and burns. Leaves softened in alcohol are used on an external basis as poultice in order to heal swollen wounds and other skin swelling. Besides the infusion made with its leaves, flowering tops and stalks are used, and they are awarded with diuretic, stimulating, emmenagogs, and antiseptic properties.