Ábrahám Levente (szerk.): Válogatott tanulmányok IV. - Natura Somogyiensis 15. / Miscellanea 4. (Kaposvár, 2009)
Dávid János: Új növénytársulás a Vitorági-erdő (Zselici Tájvédelmi Körzet) vegetációjában: Deshcampsio caespitosae-Inuletum helenii
10 Natura Somogyiensis Material and method Ten relevés were made in several valleys of the Zselic Hills between 23 September 1998 and 12 July 1999 both from the spring and the late summer aspects with classical phytosociological methods according to the Ziirich-Montpelleir school, using sampling plots of 10 X 10 m = 100 m2 size, and the A-D-values processed and evaluated with MS Exel 2007 program. The composition of the community was analyzed life-form and distribution type of the species and for their relative ecological indexes according to Ellenberg and Borhidi (Ellenberg et al 1991, Borhidi 1993) and for their social behaviour types according to Borhidi (1993). The relevé no. 6 is selected for holotype of the association (table 1). Characterization of the association The association appears along the fringes of the oak-hornbeam forests where the alluvial oak-ash-elm forests (Knautio drymeiae-Ulmetum) or the creek-side alder forests have been cut and after the deforestation wet meadows developed under the human use for hay-meadow and grazing. The dominance of the medicinal plant Inula helenium a naturalized archeophyton originates from the important role playing in the wet forests of the region, as a characteristic species of the oak-ash-elm forests (Borhidi 1984). Its prevailing going on after the cutting and grazing of the site untouched by the animals because of its poisonous property. Physiognomy and structure The community consists of two layers. The highest layer is formed by the dominant Inula helenium of 1.5-2 m height with a cover of 65-90%, followed by other tall forbs as Filipendula ulmaria, Eupatorium cannabium, Equisetum telmateia, Angelica sylvestris, Urtica dioica, Solidago gigantea, or with scattered individuals of Carex pendula and Phragmites communis. The lower layer is formed by medium sized plants and small forbs. In this usually very dense layer with cover up to 90-100% Deschampsia caespitosa is the dominant species followed by dense populations of Aegopodium podagraria, Salvia glutinosa, Lythrum salicaria, Lysimachia nummularia, Mentha pulegium, Lycopus europaeus, Myosoton aquaticum, Trifolium repens. Constant species Deschampsia caespitosa, Inula helenium, Juncus effusus, Lycopus europaeus, Lysimachia nummularia and Mentha pulegium. Sub constant species Ajuga reptans, Brachypodium sylvaticum, Equisetum telmateia, Filipendula ulmaria, Fragaria vesca, Lythrum salicaria, Polygonum hydropiper, Prunella vulgaris, Ranunculus acris, Rubus hirtus, Salvia glutinosa, Trifolium repens, Veronica chamaedrys. Distribution of life-form The ruling life-form type is the hemikryptophyta (Fig. 1). Concerning the number of species the hemitherophytes are the second but concerning the group-mass percentage, they do not reach the 10%. Flora element distribution According to the number the Eurasian and the cosmopolitan species prevail, beside them (10% participation) the circumpolar and the adventives species appear (Fig. 2). If
