Hybrids, Hybrid Cultivars and Cultivars
A natural hybrid of U. macrocarpa and U. davidiana var. japonica, named Ulmus × mesocarpa was discovered in South Korea in the 1980s. U. macrocarpa is believed to have been used in recent (post 2000) hybridization experiments at the Morton Arboretum but results have yet (2008) to be published. There are no known cultivars of this taxon.
Read more about this topic: Ulmus Macrocarpa