San Zanobi is an elm cultivar raised by the Istituto per la Protezione delle Piante (IPP), Florence. Derived from a crossing of the Dutch hybrid 'Plantyn' and the Siberian Elm Ulmus pumila, it was released for sale in 2003. It is a very fastigiate tree, with a straight, long trunk and glabrous, bright-green leaves up to 150mm long. Highly resistant to Dutch Elm Disease, it is also very fast growing, often increasing in height by over one metre per annum. However in trials in southern England, it has proven intolerant of poorly-drained ground. In Italy, San Zanobi begins flowering in its fifth year.

"San Zanobi" is Italian for St Zenobius.

References

• SANTINI . A, FAGNANI . A, FERRINI . F, & MITTEMPERGHER. L, (2002). San Zanobi and Plinio elm trees. HortScience 37(7): 1139-1141. 2002. American Society for Horticultural Science, Alexandria, VA 22314, USA.

Rosales