‘Dallas City River’ and ‘Dallas City Street’ (hybrids perhaps involving C. crenata and C. dentata) are of unknown origin and are likely products of the breeding efforts by E.A. Riehl (Godfrey, IL) or George W. Endicott (Villa Ridge, IL) at the turn of the 20th century. Both breeders used American and Japanese seedlings. It is also possible the Dallas City cultivars could be a product of Benjamin Buckman (Farmingdale, IL) or Dr. A.S. Colby, who taught at the University of Illinois, Urbana-Champaign (Nave, 1998).