Ulmus parvifolia 'Emer II'

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

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

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

Cultivation
is reputedly drought tolerant, but in the elm trials conducted by Northern Arizona University at Holbrook, Arizona,  proved unsuited to the hot, arid climate and sustained over 50% mortality in its first year, as did its sibling. The tree is being evaluated in the National Elm Trial coordinated by Colorado State University. has been introduced to Australia and Europe, and was marketed briefly in England by the Thornhayes Nursery, Devon.

Accessions

 * North America
 * Bartlett Tree Experts, North Carolina, US. Acc. no. 2001-166
 * Holden Arboretum, US. Acc. no. 98-26
 * Brenton Arboretum, Dallas Center, Iowa, US. One tree, acquired 2009. Acc. no. not known.
 * Scott Arboretum, US. Acc. no. 2000-006
 * Smith College, US. Acc. nos 302, 33603
 * University of Idaho arboretum, US. One tree. Acc. no. 1998010
 * U S National Arboretum, Washington, D.C., US. Acc. no. 64442

Nurseries
(Widely available)
 * North America
 * Australasia
 * Fleming's Nursery, Monbulk, Victoria, Australia.