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Ulmus pumila var. arborea
Also called Siberian Elm, Dwarf Elm, Manchurian Elm, Littleleaf Elm, Chinese Elm, Siberian Elm, Dwarf Elm
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. Litvinov (1908) treated it as a variety of Siberian elm, U. pumila var. arborea but this taxon was ultimately rejected by Green, who sank the tree as a cultivar: "in modern terms, it does not warrant recognition at this rank but is a variant of U. pumila maintained and known only in cultivation, and therefore best treated as a cultivar". Herbarium specimens confirm that trees in cultivation in the 20th century as U. pumila L. var. arborea Litv. were no different from 'Pinnato-ramosa' (see 'External links').
Dieck gave several specimens to the Späth nursery, which exported the tree across Europe, and to the USA. A specimen from Späth, incorrectly listed as Ulmus pinnato-racemosa, was planted at the Dominion Arboretum, Ottawa, Canada, in 1898. Some of these trees still survive, notably in the UK, and North America. Clibrans' nursery of Altrincham, Cheshire, supplied the tree in the UK in the early 20th century; the tree was later propagated and marketed by the Hillier & Sons nursery, Winchester, Hampshire from 1949, with 48 sold in the period 1962 to 1977, when production ceased.
Landowners in Italy in the 1930s were advised to plant 'Pinnato-ramosa' to replace native elms lost to the earlier strain of Dutch elm disease. Introduced to Croatia from Italy, 'Pinnato-ramosa' can now be found in many places along the Croatian littoral, where it is known as 'Turkestan Elm'. An Ulmus turkestanica (listed separately from 'Umbraculifera'), "a compact grower with smallish leaves", appeared in early 20th-century catalogues of the Gembrook or Nobelius Nursery near Melbourne, Australia.
Winged elm · American elm · Ulmus 'Androssowii' · Ulmus ×arbuscula · Ulmus minor subsp. canescens · Cedar elm · Ulmus 'Densa' · Wych Elm · Ulmus glaucescens var. glaucescens · Ulmus glaucescens var. lasiocarpa · Ulmus glaucescens · Ulmus harbinensis
Text excerpted from the Wikipedia article Ulmus pumila 'Pinnato-ramosa' by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
