Ginkgo biloba ‘Hop-Sing’ is a cultivar selected from seedlings by Josef Hahnl from Chorherrn, Austria. Like many other of his cultivars the seedlings were grown from seeds of the Old Ginkgo tree cultivated in the Schönbrunn castle in Vienna, Austria (Please see the cultivar named Ginkgo biloba ‘Schönbrunn’). 
 
Josef Hahnl has named four other cultivars: Ginkgo biloba ‘Adam’, Ginkgo biloba ‘Ben’ , Ginkgo biloba ‘Hoss’ and Ginkgo biloba ‘ Little Joe’. All named after the main characters in the American western television series, the Bonanza (1959-1973). The show is set in the 1860s and it follows the adventures of Ben Cartwright and his sons living near Virginia City in Nevada, in The United States of America. The cultivar was named after the Chinese cook who served the Cartwright family.
 
Description - This diploid cultivar has larger leaves than the species and has irregular lobbing of outer leaf margins with deep incisions, slightly resembling some polyploid cultivars. There is a difference in leaf appearance in this cultivar between leaves of older and current seasons shoots, leaves of the latter being much more deeply and irregularly lobed. The normal leaves are like another of Joseph Hahnl´s cultivars Ginkgo biloba Mephisto, compared to which they are larger and more roughly and shallowly lobed. Also woth noting is that; Ginkgo biloba ‘Mephisto’ does not show such a difference in leaf shapes between current seasons and older shoots. According to Joseph Hahnl, it is vigorous, but branching is not very regular. The annual growth rate is 20cm. It is anticipated that this cultivar will grow into an irregular form approximately 2m high with a spread of 2m in 10 years. The ultimate height and spread are not known.