title: Ulmus pumila 'Hansen'
text: # Ulmus pumila 'Hansen'
  
  The Siberian elm cultivar Ulmus pumila 'Hansen' is a little-known American tree of obscure origin, possibly raised from seed collected by the horticulturist and botanist Prof. Niels Hansen during his expedition to Siberia in 1897.
  
  ## Description
  
  Very similar to the species. A specimen planted in 1978 at the Sir Harold Hillier Gardens in England had attained a height of 8 m by 2002.
  
  * Leaves of 'Hansen'
  * 'Hansen' at Hillier Arboretum
  
  ## Cultivation
  
  The tree's current status in North America is not known; at least three mature specimens survive in the UK. Significantly, it is not listed in Green's digest of elm cultivar names published in 1964, suggesting a rather belated introduction to commerce.
  
  ## Pests and diseases
  
  See under Ulmus pumila.
  
  ## Synonymy
  
  * ?'Hansen's Hybrid': Jewell Nursery (ceased trading 2001), Lake City, Minnesota, United States. Wholesale Price List, Fall, 1968 - Spring 1969, p 6, described as "with larger leaf than Chinese (Elm)", but without provenance details.
  
  ## Accessions
  
  ### Europe
  
  * Brighton & Hove City Council, UK, NCCPG Elm Collection.
  * Sir Harold Hillier Gardens, UK. Acc. no. 1978.1606
  * Winkworth Arboretum, Surrey, UK. Tree planted 1975, plot K 37.
  