HAYDEN, Hillary S., Jaanika BLOMSTER, Christine A. MAGGS, Paul C. SILVA, Michael J. STANHOPE, & J. Robert WAALAND 2003 (Aug.) Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera Eur. J. Phycol. 38(3): 277-294, 4 figs., 5 tables. [merges genera with relevant new combinations]