Flavonoid chemistry and taxonomy in Ulmus

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Abstract

There is evidence in Ulmus of impoverishment of flavonoid constituents with evolutionary advancement and dispersal, but this is less marked in Ulmus than in Geranium and Dillenia. lnfraspecific variability is present in U. minor and U. macrocarpa. The phylogeny of Ulmus, systematic relationships within the Ulmaceae and the systematic position of the Urticales are discussed.

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