Family Code: URTICA Genus Code: PILEA Genus CN: clearweed Genus Authority: Lindl. Genus Summary: A genus of about 250 species, annual and perennial herbs, nearly cosmpolitan in tropical and warm temperate regions of the Old World and the New World. Genus References: Boufford in FNA (1997); Friis in Kubitzki, Rohwer, & Bittrich (1993). Last Updated: 2019-11-29 Publish: 1