 'Propendens' remains in cultivation in Belgium (see 'Nurseries'); no surviving mature specimens have been confirmed, although a putative specimen grows at the Botanic Garden of Eötvös Loránd University of Sciences, Budapest, Hungary.Provisionally identified as "U. laevis" 'Pendula', it has very corky-winged branchlets, atypical of the species.From the 1870s, an "U. campestris suberosa pendula" was marketed in New York by the Mount Hope Nursery (also known as Ellwanger and Barry) of Rochester, New York, where it was distinguished from "U. campestris microphylla pendula", and from the 1880s by the Späth nursery of Berlin and by Smith's of Worcester.