''Ulmus'' 'Recerta' is an American

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two dif ...

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...

raised by the

Wisconsin Alumni Research Foundation The Wisconsin Alumni Research Foundation is the independent nonprofit technology transfer organization serving the University of Wisconsin–Madison and Morgridge Institute for Research. It provides significant research support, granting tens ...

(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'' Mill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention. Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern ...

''Ulmus minor''.Maethe, H. (1985), ''Deutsche Baumschule'', Sept. 1985, 368–369.Vermeulen, N. (2001), ''Encyclopaedia of Trees & Shrubs''. Fitzroy Dearborn,

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.Götz, W. (1985). Die Ulme kehrt zurück. ''Baumschulpraxis''. Nr. 12 / 85, 504–505. Aachen-Brand: Euroflora Klette Verl., Nd Image: Recerta leaf 2.jpg, Leaves Image: Recerta bark.jpg, Bark

Pests and diseases

Tests in the USA found the cultivar to be only 'somewhat resistant to

Dutch elm disease Dutch elm disease (DED) is caused by a member of the sac fungi (Ascomycota) affecting elm trees, and is spread by elm bark beetles. Although believed to be originally native to Asia, the disease was accidentally introduced into Americas, America ...

', meanwhile evaluation in

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by the Institut National de la Recherche Agronomique (INRA) confirmed the tree as only 'moderately resistant'.

Cultivation

Serious doubts as to the tree's long term culture in Europe have been expressed.Heybroek, H. M. (1986), ''Tuin en Landschap'' 8(12): 19, 1986. Although registered in 1993 as 'Recerta' by Conrad Appel KG (ceased trading 2006), of

Darmstadt Darmstadt () is a city in the States of Germany, state of Hesse in Germany, located in the southern part of the Frankfurt Rhine Main Area, Rhine-Main-Area (Frankfurt Metropolitan Region). Darmstadt has around 160,000 inhabitants, making it th ...

, 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

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, planted in the early 1990s along with other elm cultivars.

Accessions

Not known.

References

Hybrid elm cultivar Ulmus articles with images Ulmus {{Ulmaceae-stub