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The Siberian elm cultivar Ulmus pumila 'Chinkota' [1] was developed from seed of the cultivar 'Dropmore' by the Horticulture & Forestry Department of South Dakota State University c.1955, [2] as one of a seed-produced line of extremely cold-hardy and drought-resistant trees for use in the Great Plains.
Ulmus pumila, the Siberian elm, is a tree native to Asia.It is also known as the Asiatic elm and dwarf elm, but sometimes miscalled the 'Chinese elm' (Ulmus parvifolia). U. pumila has been widely cultivated throughout Asia, North America, Argentina, and southern Europe, becoming naturalized in many places, notably across much of the United States.
The Siberian elm cultivar Ulmus pumila 'Pinnato-ramosa' was raised by Georg Dieck, as Ulmus pinnato-ramosa, at the National Arboretum, Zöschen, Germany, from seed collected for him circa 1890 in the Ili valley, Turkestan (then a region of the Russian Empire, now part of Kazakhstan) by the lawyer and amateur naturalist Vladislav E. Niedzwiecki while in exile there.
The good news for the milkvetch plant is that they usually need wildfire to sprout — meaning dormant seeds now have a massive new habitat for a new crop of the rare shrub.
The Ulmus pumila cultivar 'Aurescens' was introduced by Georg Dieck at the National Arboretum, Zöschen, Germany, circa 1885.Dieck grew the tree from seed collected in the Ili valley, Turkestan (then a region of Russia, now part of Kazakhstan) by the lawyer and amateur naturalist Vladislav E. Niedzwiecki while in exile there.
The Siberian Elm cultivar Ulmus pumila 'Pendula' is from northern China, where it is known as Lung chao yü shu (: Dragon's-claw elm). [1] It was classified by Frank Meyer in Fengtai in 1908, [ 2 ] and introduced to the United States by him from the Peking Botanical Garden [ 1 ] as Weeping Chinese Elm . [ 3 ]
Ulmus pumila, or 'Poort Bulten,' is a Siberian elm cultivar propagated from a tree in Arboretum Poort Bulten in Losser, Netherlands. The original, planted c.1912 by landscape architect Leonard Springer, was included in what was mainly a collection of evergreens, most of which were felled for firewood during World War II.
The Siberian elm cultivar Ulmus pumila 'Green King' was once believed to have been derived from a crossing of the Siberian Elm Ulmus pumila with the American Red Elm Ulmus rubra. However, it is now apparent the tree originated as a sport of U. pumila in 1939 at the Neosho Nurseries, Neosho , Missouri .