Ulmus 'Recerta'

Ulmus hybrid

'Recerta' at Amerbos, Amsterdam.

Photo: R. Nijboer, Bonte Hoek kwekerijen
Details
Hybrid parentage U. pumila × U. minor
Cultivar 'Recerta'
Origin USA

'Recerta' is an American 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]

Contents

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 1579581196
  3. ^ Götz, W. (1985). Die Ulme kehrt zurück. Baumschulpraxis. Nr. 12 / 85, pp 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, p 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.