Ulmus 'Recerta'
Ulmus 'Recerta' is an American hybrid cultivar raised by the Wisconsin Alumni Research Foundation (WARF) as selection '196-5' from seed obtained from a Siberian Elm Ulmus pumila in Volgagrad, Russia; the male parent deduced as the Field Elm Ulmus minor.[1][2]
| 'Ulmus 'Recerta' | |
|---|---|
 'Recerta' at Amerbos, Amsterdam. | |
| Genus | Ulmus |
| Hybrid parentage | U. pumila × U. minor |
| Cultivar | 'Recerta' |
| Origin | US |
Description
'Recerta' produces a straight, clean stem, supporting a rounded crown. The leaves are elliptic, with typically acuminate tip, the blade 6–12 cm long by 3–6.5 cm broad; the margins are doubly, if bluntly, serrate.[3]
Leaves
Bark
Pests and diseases
Tests in the USA found the cultivar to be only 'somewhat resistant to Dutch elm disease',[4] meanwhile evaluation in France by the Institut National de la Recherche Agronomique (INRA) confirmed the tree as only 'moderately resistant'.[5]
Cultivation
Serious doubts as to the tree's long term culture in Europe have been expressed.[6] Although registered in 1993 as 'Recerta' by Conrad Appel KG (ceased trading 2006), of Darmstadt, Germany, the tree is not known to have ever been in commerce.
Notable trees
A mature specimen grows in a park in the Amerbos district of north Amsterdam, planted in the early 1990s along with other elm cultivars.
Accessions
Not known.
References
- Maethe, H. (1985), Deutsche Baumschule, Sept. 1985, 368–369.
- Vermeulen, N. (2001), Encyclopaedia of Trees & Shrubs. Fitzroy Dearborn, ISBN 1-57958-119-6
- Götz, W. (1985). Die Ulme kehrt zurück. Baumschulpraxis. Nr. 12 / 85, 504–505. Aachen-Brand: Euroflora Klette Verl., Nd
- 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.
- Pinon, J. (July 2007). "Les ormes résistants à la graphiose" [Elms resistant to Dutch Elm Disease] (PDF). Forêt-entreprise. Paris, France: IDF (175): 37–41. ISSN 0752-5974. Retrieved 26 October 2017.
- Heybroek, H. M. (1986), Tuin en Landschap 8(12): 19, 1986.