Vegetation Science Group

Department of Botany and Zoology | Faculty of Science | Masaryk University

Vegetation of the Czech Republic

Association XBB01
Mercurialietum annuae Kruseman et Vlieger ex Westhoff et al. 1946

Mercurialietum annuae

Photo on botanickafotogalerie.cz

Mercurialietum annuae is the more thermophilous of the two asssociations of the alliance Veronico-Euphorbion occurring in the Czech Republic. It occurs in dry and warm lowlands in root-crop fields, vineyards, kitchen gardens, stubble fields and ruderal habitats. Soils are heavy, clayey to loamy and near-neutral to basic. Most species of this association are annual weeds which germinate in late spring; the phenological optimum of this association is in late summer.

Orig. (Westhoff et al. 1946): Mercurialietum annuae Kr. et Vl. 1939

Syn.: Mercurialietum annuae Kruseman et Vlieger 1939 prov. (§ 3b), Amarantho-Fumarietum J. Tüxen 1955, Setario viridis-Fumarietum J. Tüxen 1955, Setario-Veronicetum politae Oberdorfer 1957, Stellario mediae-Mercurialietum annuae Ubrizsy 1967, Thlaspio-Veronicetum politae Görs 1966, Amarantho retroflexi-Diplotaxietum muralis amaranthetosum Holzner 1973, Amarantho-Chenopodietum albi Schubert 1989

Diagnostic species: Amaranthus powellii, A. retroflexus, Chenopodium album agg., C. hybridum. Echinochloa crus-galli. Galinsoga parviflora. Mercurialis annua, Solanum nigrum s. l.

Constant species: Amaranthus powellii, A. retroflexus, Capsella bursa-pastoris, Chenopodium album agg., C. hybridum. Cirsium arvense. Convolvulus arvensis. Echinochloa crus-galli. Elytrigia repens. Polygonum aviculare agg. (predominantly P. aviculare s. str.), Solanum nigrum s. l., Stellaria media agg. (predominantly S. media s. str.), Taraxacum sect. Ruderalia. Tripleurospermum inodorum

Dominant species: Amaranthus retroflexus. Chenopodium album agg., Galinsoga parviflora

Formal definition: Group Amaranthus retroflexus NOT Group Consolida regalis NOT Atriplex tatarica cover > 25 % NOT Chenopodium album agg. cover > 50 % NOT Iva xanthiifolia cover > 15 %

Source: Lososová Z. (2009): XBB01 Mercurialietum annuae Kruseman et Vlieger ex Westhoff et al. 1946. In: Chytrý M. (ed.), Vegetace České republiky. 2. Ruderální, plevelová, skalní a su»ová vegetace [Vegetation of the Czech Republic 2. Ruderal, weed, rock and scree vegetation]. Academia, Praha, pp. 103-105.