 This confusion was exacerbated in the 1960s when cuttings of Mondeuse noire labeled as "Refosco" were taken by the University of California, Davis from a vineyard in Amador County that was established in 1880s and propagated.In 1990s ampelographers began suspecting that these cuttings were not Refosco but rather Mondeuse noire, a fact later confirmed by DNA profiling.In addition to the confusion with Refosco, some plantings of Mondeuse noire in the Russian River Valley were discovered to actually be an offspring of Mondeuse noire, Calzin.