Eroium cicutarium, also known as Redstem filaree, Common Stork's-bill, is an herbaceous annual, and in warm climates a biennial member of the Geranium Family of flowering plants. It is native to the Mediterranean Basin and was introduced to North America in the eighteenth century, where it has since become invasive, particularly of the deserts and arid grasslands of the southwestern United States. The seeds of this annual are a species collected by various species of harvester ants.