Vegetation Science Group

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

Vegetation of the Czech Republic

Alliance RBC
Caricion canescenti-nigrae Nordhagen 1937

This alliance includes moderately rich fens without the calcicolous species typical of the alliance Caricion davallianae, but still rather species-rich and containing species that avoid extremely acidic habitats. Stands are dominated by short sedges, grasses, dicots and by Sphagnum species from the sections Subsecunda and Squarrosa. Non-sphagnaceous mosses (e.g. Aulacomnium palustre. Calliergonella cuspidata or Warnstorfia exannulata) may also occur and even dominate on some sites. The most acidic poor fens dominated by species of Sphagnum sect. Cuspidata are not included in this alliance. Habitats include managed fen grasslands, fens at fishpond margins and subalpine spring fens. The habitats are fed by ground water which is richer in nutrients than in other alliances of the class Scheuchzerio-Caricetea nigrae. The alliance occurs in most European countries.

Nomen mutatum propositum

Orig. (Nordhagen 1937): Caricion canescentis-Goodenowii (Carex goodenowii = C. nigra)

Syn.: Rhynchosporion albae Koch 1926 (§ 36, nomen ambiguum), Drepanocladion exannulati Krajina 1933 (§ 29b), Eriophorion gracilis Oberdorfer 1957 p. p., Caricion demissae Rybníček 1964 p. p., Caricion fuscae sensu auct. non Koch 1926 (pseudonym)

Diagnostic species: Agrostis canina. Carex canescens. C. diandra. C. echinata. C. nigra. C. panicea. C. rostrata. Drosera rotundifolia. Eriophorum angustifolium. Menyanthes trifoliata. Nardus stricta. Potentilla erecta. P. palustris. Rhynchospora alba. Valeriana dioica. Viola palustris; Aulacomnium palustre. Sphagnum palustre. S. subsecundum. S. teres. Straminergon stramineum. Warnstorfia exannulata

Constant species: Agrostis canina. Anthoxanthum odoratum s. l. (predominantly A. odoratum s. str.), Carex echinata. C. nigra. C. panicea. Cirsium palustre. Eriophorum angustifolium. Festuca rubra agg., Luzula campestris agg., Nardus stricta. Potentilla erecta. Viola palustris; Aulacomnium palustre

Source: Hájek M. & Hájková P. (2011): RBC Caricion canescenti-nigrae Nordhagen 1937. In: Chytrý M. (ed.), Vegetace České republiky. 3. Vodní a mokřadní vegetace [Vegetation of the Czech Republic 3. Aquatic and wetland vegetation]. Academia, Praha, pp. 660-662.