Ulmus laevis var. parvifolia

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Ulmus laevis var. parvifolia
Scientific classification edit
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Ulmaceae
Genus: Ulmus
Species:
Variety:
U. l. var. parvifolia
Trinomial name
Ulmus laevis var. parvifolia
Jovanović & Radulović

Ulmus laevis var. parvifolia is a mutant variety of European White Elm found exclusively on the island of Ada Ciganlija, in the Sava at Belgrade, Serbia.[1]

Description[edit]

The tree is small and has a dense crown. The leaves are much smaller than those of the species, 21 – 59 mm (average 40 mm) in length by 14 – 36 mm (average 26 mm) width, and chartreuse in colour. The specimen of var. parvifolia on Ada Ciganlija is very slow-growing, attaining a height of only 5.5 m in almost 60 years, with a d.b.h. of just 13 cm.

Pests and diseases[edit]

Not known, but the species has a field resistance to Dutch elm disease, through the presence of a triterpene, Alnulin, in the bark which acts as an antifeedant to the vector Scolytus beetles.

Cultivation[edit]

The tree is not known to have ever flowered, thus propagation is by cuttings only. The variety is not known to be in commerce in Serbia or elsewhere.

References[edit]

  1. ^ Jovanović, B. & Radulović, S. (1980). O jednom novom varyetetu veza. (About a new variety of the European white elm (Ulmus laevis Pall. var. Parvifolia var. n.) Abstract in English.) Glasn. Prir. Muz. Beogradu, B. no. 35. 29-38 (1980). Museum of Natural History (Belgrade), Serbia.