 The wind-pollinated apetalous flowers are produced on second-year shoots in April; the variably-shaped samarae < 25 mm long by 20 mm wide ripen in June.Resistant to Dutch elm disease, "U. pseudopropinqua" has also been found to be among the least suitable species for feeding and reproduction by elm leaf beetle "Xanthogaleruca luteola"  and highly preferred for feeding by the Japanese beetle "Popillia japonica" in the United States.The species is one of a range of rare Chinese elms evaluated as landscape plants at the Morton Arboretum, Illinois.