Vegetation Science Group

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

Vegetation of the Czech Republic

Association XDE07
Oenothero biennis-Helianthetum tuberosi de Bolòs et al. 1988

Oenothero biennis-Helianthetum tuberosi

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This association includes stands dominated by Helianthus tuberosus, a tall perennial herb which is a neophyte of North American origin. It occurs on banks and alluvia of rivers, along roads, railways, on abandoned fields, building rubble and dumping sites near settlements. It has naturalized on some forest edges or clearings where this species was originally planted as a source of game fodder. Once established on a particular site it may persist for a long time due to vegetative reproduction through an extensive rhizome system. Helianthus tuberosus stands are scattered across the Czech Republic, being more common in lowlands and large river corridors.

Orig. (de Bolòs et al. 1988): Oenothero-Helianthetum tuberosi (Oenothera biennis subsp. biennis)

Syn.: Impatienti-Solidaginetum Moor 1958 p. min. p. (§ 36, nomen ambiguum), Helianthetum decapetali Morariu 1967 (§ 2b, nomen nudum), Artemisio-Helianthetum decapetali Mititelu in Mititelu et Dorca 1987 (§ 2b, nomen nudum)

Diagnostic species: Helianthus tuberosus

Constant species: Artemisia vulgaris. Elytrigia repens, Helianthus tuberosus, Urtica dioica

Dominant species: Helianthus tuberosus

Formal definition: Helianthus tuberosus cover > 25 % NOT Salix fragilis cover > 25 % NOT Sambucus nigra cover > 25 %

Source: Láníková D. (2009): XDE07 Oenothero biennis-Helianthetum tuberosi de Bolòs et al. 1988. 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. 365-368.