 × hollandica" × "U. minor") by the Istituto per la Protezione delle Piante (IPP), Florence, to create 'Morfeo', a robust, fast-growing tree patented and released to commerce in 2011.IPP also hybridized "U. chenmoui" with the early Dutch hybrid cultivar 'Groeneveld', identifying the new cultivar as 'FL522', however this was never released to commerce.The species was named for Mr Chen Mou, assistant in Dendrology at the National Central University (now Nanjing University) circa 1933, by W C Cheng.