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]
'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]
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]
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.
A mature specimen grows in a park in the Amerbos district of north Amsterdam, planted in the early 1990s along with other elm cultivars.
Not known.