Chromolaena oteroi, commonly known as the Mona Island thoroughwort, is a species of flowering shrub in the family Asteraceae. It has been found only on Mona Island, a small island between Puerto Rico and Hispaniola in the West Indies and politically a part of the Commonwealth of Puerto Rico.Monachino, Joseph Vincent 1948. Phytologia 2: 406-407King, Robert Merrill & Robinson, Harold Ernest 1970. : Phytologia 20: 204Woodbury, RC, LF Martorell, & JG García-Turarí. 1977. Flora of Mona and Monito Islands. Bulletin of the University of Puerto Rico Agricultural Experiment Station 252
The shrub, with its pale purple flowers, was named after botanist José I. Otero.
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