Wireweed
Wireweed may refer to several organisms, including:

 Amphibolis, a genus of marine flowering plants in the family Cymodoceaceae
 Polygonella, a genus of flowering plants in the knotweed and smartweed family, Polygonaceae. Rigiopappus leptocladus, a species of flowering plant in the daisy family, Asteraceae. Sargassum muticum, also known as the Japanese wireweed, is a large brown seaweed of the genus Sargassum. Sida (plant), a genus of flowering herbs and subshrubs in the mallow family, Malvaceae.