Marisia - Maros Megyei Múzeum Évkönyve 29-30/2. (2010)
Botany
Mesophilicgrasslands of Molinio-Arrhenatheretea class of Sighisoara-Tärnava Mare site Species present in one re leve: Rorippa pyrenaica (1), Potentilla erecta (2), Veronica beccabunga (2), Trifolium hybridum (3), Carex distans (3), Cerastius holosteoides (3), Juncus effusus (3), Potentilla reptans (3), Rhinanthus rumelicus (3), Symphytum officinale (3), Carex vulpina (3), Galium palustre (3), Lysimachia vulgaris (3), Ranunculus lingua (3), Sparganium erectum ssp. neglectum (3), Typha latifolia (3), Centauriumpulchellum (4), Cirsium oleraceum (4), Lycopus europaeus (4), Mentha verticillata (4), Allisma plantago-aquatica (4), Glyceria maxima (4), Cyperus flavescens (4), Holcus lanatus (5), Juncus effusus var. compactus (5), Mentha aquatica (5), Phleum pratensis (5), Galeopsis tetrahit (5). Location and date of relevés: Rl-2 - Cloa§terf; 2005.07.29; R3-$ae$, La Lac, N 46° 09', E 24° 46’, 2006.07.22; R4 - Noistat; N 46° 02', E 24° 486', 2007.07.27; R5 - Brädeni; N 46° 05', E 24° 47', 2007.07.28; Ranunculeto strigulosi-Equisetum palustris Gh. Popescu (1974) 1975 This association is least known in Romania, being cited in the Tárnavelor Plateau by §t. Csűrös, A. Kovács (1962), in Oltenia by Gh. Popescu (1974) and in north-west of Romania by Petru Burescu (2003). The association was identified in §ae§, on the shores of the lake “La Lac”, a land with excessive humidity, especially in spring. The phytocoenoses of this association are interposed between sedges and wet meadows. The two characteristic species Equisetum palustre and Ranunculus acris ssp. strigulosus have a similar ecology, edifying the phytocoenoses of this association. Species for the recognition of Calthion alliance are: Galium uliginosum, Angelica sylvestris, Holcus lanatus etc., and the most representative species of the Molinietalia order are: Potentilla anserina, Lythrum salicaria, Mentha longifolia, Valeriana officinalis, Juncus effusus etc. Transgressive species, immigrated from subordinated associations of Phragmitetea class, play an important coenotic role in the structure of phytocoenoses: Eleocharis palustris, Carex vulpina. HdR: 3709 - Danube communities with Juncus effusus, Juncus inflexus andAgrostis canina They are generally used as pasture phytocoenoses. Epilobio-Juncetum effusi Oberd. 1957 Rush phytocoenoses have been identified in the hilly level of Ruja, between Teline and Reti§, and in Retij, Ruja, §aej, §arpatoc, Vulcan, on the flats, at altitudes between 430—600 m in the floodplains of streams. Exposed to zoo-anthropogenic impacts, the association is developing under the action of grazing cattle, which favors the dominance of Juncus effusus synusia. Phytocoenoses have 83 species in their floristic composition (in six surveys analyzed, Table 2) and have a 70—98% coverage. The most numerous species belong to the Molinietalia order: Lysimachia vulgaris, Mentha longifolia, Epilobium palustre, Juncus articulatus, Myosotis scorpioides, Trifolium hybridum, Agrostis stolonifera, Alopecurus pratensis, Cirsium rivulare, Deschampsia caespitosa, Epilobium parviflorum, Equisetum palustre, Galium uliginosum, Inula britannica, Juncus atratus, Juncus conglomeratus, Mentha aquatica, Mentha x verticillata, Potentilla anserina, Potentilla reptans, but also of the Molinio-Arrhenatheretea class: Achillea millefolium, Agrostis capillaris, Centaurium erythraea, Holcus lanatus, Lysimachia nummularia, Ranunculus acris, Ranunculus repens, Stellaria graminea. In the analyzed phytocoenoses are also present characteristic species of Phragmitetea class: Carex vulpina, Lycopus europaeus, Lythrum salicaria. 13
