| Ulmus laevisvar. celtidea | |
|---|---|
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Ulmus |
| Species: | |
| Variety: | U. l.var. celtidea |
| Trinomial name | |
| Ulmus laevisvar. celtidea | |
Ulmus laevis var.celtideaRogow. [: likeCeltis, the leaves] is a putative variety ofEuropean White Elm first described byRogowicz,[1] who found the tree in 1856 along the riverDnjepr[2] nearChernihiv in what is now northern Ukraine. The type specimen is held at the National Herbarium of Ukraine.[3] The variety was first named asUlmus pedunculata var.celtidea.[2]Litvinov (1908) considered it a species, calling itUlmus celtideaLitv., a view not upheld by other authorities.[4]
Similar trees were later found nearBriansk inOryol Oblast, but featured larger leaves.[5]
The leaves are oblong-lanceolate, but only about 25 millimetres (1 in) in length, long-acuminate at the apex, and coarsely, sharply serrate, cuneate and sub-equal at the base. Thesamarae were also notably smaller than the species.[6] A 1906 herbarium specimen (leaves and fruit) in theBerlin Botanical Museum labelledU. celtidea Litv., from Orel province, Russia, has, however, leaves to 2 or 3 inches.[7]
One specimen which grew at the Strona Arboretum, University of Life Sciences,Warsaw, Poland, (asUlmus celtideaLitv.) died circa 2006. The tree was grown from seed collected from a tree at the Arboretum of the Forest-Technical Academy inSt. Petersburg in 1961; it is not known whether this source is still alive. No cultivars or hybrid cultivars are known.
