Ulmus parvifolia 'Emer II' = Allee

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Ulmus parvifolia
Cultivar 'Emer II' or 'Emerald Vase' = Allee
Origin USA

The Chinese Elm cultivar Ulmus parvifolia 'Emer II' or 'Emerald Vase' (selling name Allee) was cloned from a tree planted circa 1910 on the University of Georgia campus at Athens.

Description[edit]

Allee can reach a height of about 15 m, with a more upright crown shape than its stablemate Athena, its spread approximately 13 m, with arching branches bearing medium green, glossy leaves turning orange to rust red in autumn. [1] The exfoliating, mottled bark has a puzzle-like pattern, and is considered attractive.[1]

Pests and diseases[edit]

The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola.[2] As with the species overall, damage caused by Japanese Beetle is relatively slight (< 8% defoliation).[3]

Cultivation[edit]

Allee is reputedly drought tolerant, but in the elm trials [2] conducted by Northern Arizona University at Holbrook, Arizona, Allee proved unsuited to the hot, arid climate and sustained over 50% mortality in its first year, as did its sibling Athena. The tree is being evaluated in the National Elm Trial [3] coordinated by Colorado State University. Allee has reached Australia, but is not known to have been introduced to Europe.

Accessions[edit]

North America

Nurseries[edit]

North America

(Widely available)

Australasia

References[edit]

  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. 
  2. ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017. 
  3. ^ Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. 2008 Research Report, Nursery & Landscape Program, pp 15, 16. University of Kentucky.

External links[edit]