Vegetation Science Group

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

Vegetation of the Czech Republic

Association TFF02
Alysso alyssoidis-Sedetum Oberdorfer et Müller in Müller 1961

Alysso alyssoidis-Sedetum

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This association includes communities of succulents, mainly Sedum album and S. acre, and vernal therophytes on limestone and other calcareous rocks. It occurs both on natural rock outcrops as well as in quarries. In contrast to the association Cerastietum, its stands contain more succulents and less therophytes. The association is most common in colline landscapes of northern and central Bohemia and southern Moravia, but isolated occurrences are also found in other areas with warm, dry climate.

Orig. (Müller 1961): Alysso-Sedetum Oberd. et Th. Müller 61 (Alyssum alyssoides, Sedum acre, S. album, S. boloniense ~ S. sexangulare)

Syn.: Saxifrago tridactylitae-Poëtum compressae (Kreh 1945) Géhu et Leriq 1957 (fantom), Saxifrago tridactylitae-Poëtum compressae Géhu 1961, Trifolio arvensis-Sedetum albi Vicherek in Chytrý et Vicherek 1996

Diagnostic species: Acinos arvensis, Arenaria serpyllifolia agg., Echium vulgare, Erysimum crepidifolium, Iris pumila, Medicago minima, Melica transsilvanica, Poa bulbosa, Sedum acre, S. album, Teucrium botrys; Syntrichia ruralis, Tortella inclinata

Constant species: Acinos arvensis, Arenaria serpyllifolia agg., Centaurea stoebe, Echium vulgare, Sedum acre, S. album; Ceratodon purpureus

Dominant species: Sedum album

Formal definition: Sedum album cover > 5 % AND Group Acinos arvensis NOT Group Poa badensis NOT Festuca pallens cover > 5 % NOT Festuca valesiaca cover > 5 %

Source: Sádlo J. (2007): TFF02 Alysso alyssoidis-Sedetum Oberdorfer et Müller in Müller 1961. In: Chytrý M. (ed.), Vegetace České republiky. 1. Travinná a keříčková vegetace [Vegetation of the Czech Republic. 1. Grassland and Heathland Vegetation]. Academia, Praha, pp. 363-365.