Thus Max Wichura doubts whether hybrids ever revert to their parent forms, and he experimented on uncultivated species of willows, while Naudin, on the other hand, insists in the strongest terms on the almost universal tendency to reversion in hybrids, and he experimented chiefly on cultivated plants.
Naudinek, aitzitik, hibridoek gibelamendura duten joera ia unibertsala azpimarratzen du hitzik indartsuenez, eta honek landare landuetan esperimentatu zuen nagusiki.