Ulmus 'Recerta'
Template:Infobox Cultivar 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 Volgograd, 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]
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Leaves
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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.
References
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- ↑ Maethe, H. (1985), Deutsche Baumschule, Sept. 1985, 368–369.
- ↑ Vermeulen, N. (2001), Encyclopaedia of Trees & Shrubs. Fitzroy Dearborn, Template:ISBN
- ↑ Götz, W. (1985). Die Ulme kehrt zurück. Baumschulpraxis. Nr. 12 / 85, 504–505. Aachen-Brand: Euroflora Klette Verl., Nd
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- ↑ Heybroek, H. M. (1986), Tuin en Landschap 8(12): 19, 1986.
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Template:Elm species, varieties, hybrids, hybrid cultivars and species cultivars