Ulmus parvifolia 'Zettler' (selling name Heritage)[1] is a Chinese Elm cultivar that is one of three[clarification needed] recent[timeframe?] (< 2006) American introductions selected for their cold hardiness (USA zone 4 tolerant).
| Ulmus parvifolia 'Zettler' | |
|---|---|
| Species | Ulmus parvifolia |
| Cultivar | 'Zettler' = Heritage |
| Origin | US |
Description edit
Heritage has a strong, upright habit and excellent branching structure, bearing deep green glossy foliage that turns to an attractive autumn colour in some years.
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]
Cultivation edit
Heritage was selected from over 20,000 seedlings in 1975, and subsequently proved to be one of the hardiest Chinese or Lacebark Elms available in the United States, surviving −33 °C (−27 °F) in Illinois during the winter of 1989 without sustaining any damage whatsoever. Heritage is not known to have been introduced to Europe or Australasia.
Accessions edit
None known.
Nurseries edit
- North America
References edit
- ^ "Elms". Archived from the original on 2006-11-14. Retrieved 2007-02-01.
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
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