Ulmus 'Clusius'
| Ulmus 'Clusius' | |
|---|---|
'Bea Schwarz' selfed | |
| Cultivar | 'Clusius' |
| Origin | Wageningen, The Netherlands |
Ulmus 'Clusius' is a Dutch
Description
The tree has a broader crown than its siblings', whilst the generally
Like 'Lobel', the tree flushes markedly later than most other elms, and is rarely in full leaf before mid-May.Pests and diseases
Whilst the resistance of 'Clusius' to Dutch elm disease proved marginally greater than that of its Dutch predecessors, rated 4 out of 5,[3] it has been eclipsed by later developments such as Lutèce. Consequently, sales in the Netherlands declined from over 8,000 in 1979 to 600 in 2004.[4]
Cultivation
While 'Clusius' remains for sale in Europe, its planting where the disease remains prevalent cannot be recommended.[5] 'Clusius' featured in New Zealand government trials during the 1990s at the Hortresearch station, Palmerston North, but is not known to have been introduced to North America.
Etymology
The cultivar is named for Carolus Clusius, a Dutch naturalist of the Renaissance.
Accessions
- Europe
- , France. No details available
- Grange Farm Arboretum, Sutton St James, Spalding, Lincs., UK. Acc. no. 817.
- Sir Harold Hillier Gardens, Ampfield, Romsey, Hampshire, UK. Acc. no: 2019.0441
- Wijdemeren City Council, Netherlands. Elm Collection. planted mainly in Kortenhoef since 2006.
Nurseries
References
- ^ Heybroek, Hans M. (1983). Burdekin, D.A. (ed.). "Resistant elms for Europe" (PDF). Forestry Commission Bulletin (Research on Dutch Elm Disease in Europe) (60). London: HMSO: 108–113.
- ISBN 978-1-4615-6874-2. Retrieved 26 October 2017.
- ISBN 978-90-5011-281-9
- ^ Hiemstra, J.A.; et al. (2007). Belang en toekomst van de iep in Nederland [Importance and future of the elm in the Netherlands]. Wageningen, Netherlands: Praktijkonderzoek Plant & Omgeving B.V. Retrieved 26 October 2017.
- ISSN 1362-5128. Retrieved 26 October 2017.