''Ulmus'' × ''intermedia'' 'Improved Coolshade'

Ulmus × intermedia cultivar
Hybrid parentage U. rubra × U. pumila
Cultivar 'Improved Coolshade'
Origin Sarcoxie, Missouri, USA

The hybrid elm cultivar Ulmus × intermedia 'Improved Coolshade' is a superior selection from 'Coolshade' (U. rubra × U. pumila) and was patented and released by the Sarcoxie Nurseries, Sarcoxie, Missouri, in 1958.

Description

The tree is similar to 'Coolshade', but faster growing.

Pests and diseases

Although reputedly resistant to Dutch elm disease, it had not been (by 1995) widely tested.[1]

Cultivation

'Improved Coolshade' was noted for its drought tolerance. It is not known whether the tree remains in cultivation in North America, nor whether it was introduced to Europe or Australasia.

Synonymy

  • 'Primus' (earlier name for the cultivar).

References

  1. ↑ Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.