Pterocaulon
 Pterocaulon redirects here. For the seaweed see Sargassum.Pterocaulon is a genus of flowering plants in the Asteraceae family native to North and South America and to Australasia. The plants are perennial herbs frequently densely covered with woolly hairs. The generic name means winged stem referring to the decurrent leaf bases that give the appearance of wings running down the sides of the stems.