Eupatorium fistulosum Barratt, Eupatoria Verticillata: No. 1. 1841 Eupatorium fistulosum Barratt, Eupatoria Verticillata: No. 1. 1841is basionym for Eutrochium fistulosum (Barratt) E. E. Lamont in Sida 21: 901. 2004Taxon for this nameEupatorium fistulosum Barratt, Eupatoria Verticillata: No. 1. 1841