Nodeweed

Synedrella nodiflora

''Synedrella'' is a genus of flowering plants in the sunflower family.

It contains only one known species, ''Synedrella nodiflora'', native to South America, Central America, Mexico, the West Indies, and Florida. It is naturalized in much of Asia, northern Australia, some Pacific Islands, and tropical Africa. Nodeweed is a common name for this species.