Ulmus 'Recerta'

Ulmus hybrid

'Recerta' at Amerbos, Amsterdam.
Hybrid parentage U. pumila × U. minor
Cultivar 'Recerta'
Origin USA

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]

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]

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 at Amerbos, Amsterdam.

Accessions

Not known.

References

  1. ↑ Maethe, H. (1985), Deutsche Baumschule, Sept. 1985, pp. 368-369.
  2. ↑ Vermeulen, N. (2001), Encyclopaedia of Trees & Shrubs. Fitzroy Dearborn, ISBN 1-57958-119-6
  3. ↑ Götz, W. (1985). Die Ulme kehrt zurück. Baumschulpraxis. Nr. 12 / 85, 504–505. Aachen-Brand: Euroflora Klette Verl., Nd
  4. ↑ Santamour, F. S., & Bentz, S. E. Updated checklist of elm (Ulmus) cultivars for use in North America. Journal of Arboriculture, 21(3): May, 1995.
  5. ↑ Pinon, J. 2007). Les ormes résistants à la graphiose (:Elms resistant to Dutch Elm Disease). Forêt-entreprise, No. 175 - Juillet 2007, 37–41, IDF, Paris, France. http://www.foretpriveefrancaise.com/data/info/127219-P.pdf
  6. ↑ Heybroek, H. M. (1986), Tuin en Landschap 8(12): 19, 1986.
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