Dynamics of Rubus ulmifolius Schott var. anaplothyrsus Sudre and other cultivated blackberries in Italy.

In Italy, the following important blackberries are cultivated: Rubus ulmifolius, R. armeniacus and R. laciniatus. Italy is proposed as a possible place of origin of R. ulmifolius and its spineless race var. anoplothyrsus. The other two species are introduced. All of them show a characteristic differentiation and migration.