in C. H. Persoon, Syn. Pl. 2: 472. 1807
s United States, Mexico, West Indies, Central America, South America, introduced in Asia, Africa, Pacific Islands, Australia.
Species 30 (2 in the flora).
Acmella pilosa R. K. Jansen has been reported as introduced in Florida (http://www.plantatlas.usf.edu); it differs from A. repens mainly by its more densely pilose stems and leaves and more truncate to cordate (versus cuneate) leaf bases.