Formal definition: Fraxinus angustifolia cover > 5 % AND (groupSymphytum officinale OR groupUrtica dioica)
Citation: Douda J. (2013): Fraxino pannonicae-Ulmetum glabrae Aszód 1935 corr. Soó 1963. – In: Chytrý M. (ed.), Vegetace České republiky. 4. Lesní a křovinná vegetace [Vegetation of the Czech Republic 4. Forest and shrub vegetation], p. 216–219, Academia, Praha.
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