Tags: Cultivar (Cultivated Variety).
The American Elm Ulmus americana cultivar ‘American Liberty’ is in fact a group of six genetically distinct cultivars under a single name although they are superficially similar. The Liberty elm is reportedly suitable for street planting being tolerant of de-icing salts and air pollution. However examples included in 10-year trials at Atherton California to evaluate replacements for Californian elms lost to disease did not perform well.