A cultivar of Alternanthera brasiliana related to Alligator Weed A. philoxeriodes and Khaki Weed A. pungens. It comes from tropical and subtropical Central and South America. An emerging weed in the Enoggera catchment due to its heavy use as an ornamental in gardens and public places. It means alternating anther. Pronounced al-ter-NANTH-ur-uh. Purple Joyweed is often hedged. Was known as Alternanthera dentata.
Photo: Robert Whyte