Origin USA Rank Cultivar | Higher classification Chinese elm | |
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Scientific name Ulmus parvifolia 'Emer II' Similar Chinese elm, Elm, Ulmus parvifolia 'Drake', Ulmus 'Morton Stalwart, Ulmus americana 'Princeton' |
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.
Contents
![Ulmus parvifolia 'Emer II' = Allee Ulmus parvifolia 39Emer II Allee39 Chinese Elm Lacebark Elm](https://alchetron.com/cdn/ulmus-parvifolia-emer-ii--allee-e4ddc24f-b85d-4b05-8f31-6f184980883-resize-750.jpeg)
Description
![Ulmus parvifolia 'Emer II' = Allee Ulmus parvifolia 39Emer II39 sold as Allee R](https://alchetron.com/cdn/ulmus-parvifolia-emer-ii--allee-11419dd5-d93f-4200-a535-55fed3f3fc7-resize-750.jpeg)
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.
Pests and diseases
![Ulmus parvifolia 'Emer II' = Allee Ulmus parvifolia 39Emer II39](https://alchetron.com/cdn/ulmus-parvifolia-emer-ii--allee-d657fb84-597a-445e-b8b2-36e08939025-resize-750.jpeg)
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).
Cultivation
Allee is reputedly drought tolerant, but in the elm trials [3] 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 [4] coordinated by Colorado State University. Allee has reached Australia, but is not known to have been introduced to Europe.
Accessions
![Ulmus parvifolia 'Emer II' = Allee Ulmus parvifolia 39Emer II39 Deep Fork Tree Farm](https://alchetron.com/cdn/ulmus-parvifolia-emer-ii--allee-59017e30-773d-4cf9-a172-4b8cc4aaef7-resize-750.jpg)
Nurseries
(Widely available)