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Ulmus Laevis Var. Parvifolia
''Ulmus laevis'' var. ''parvifolia'' is a mutant variety of Ulmus laevis, European white elm found exclusively on the island of Ada Ciganlija, in the Sava at Belgrade, Serbia.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. Description 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 (color), 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 diameter at breast height, d.b.h. of just 13 cm. Pests and diseases Not known, but the species has a field resistance to Dutch elm dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Laevis
''Ulmus laevis'' Pall., variously known as the European white elm, fluttering elm, spreading elm, stately elm and, in the United States, the Russian elm, is a large deciduous tree native to Europe, from France northeast to southern Finland, east beyond the Urals into Kyrgyzstan and Kazakhstan, and southeast to Bulgaria and the Crimea; there are also disjunct populations in the Caucasus and Spain, the latter now considered a relict population rather than an introduction by man, and possibly the origin of the European population.Fuentes-Utrilla, P., Squirrell, J., Hollingsworth, P. M. & Gil, L. (2006). ''Ulmus laevis (Pallas) in the Iberian Peninsula. An introduced or relict tree species? New data from cpDNA analysis.'' Genetics Society, Ecological Genetics Group conference, University of Wales Aberystwyth 2006. ''U. laevis'' is rare in the UK, although its random distribution, together with the absence of any record of its introduction, has led at least one British authority to consi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
