Marisia - Maros Megyei Múzeum Évkönyve 31/2. (2011)
Botany
ENDANGERED PLANT SPECIES IN THE FLORISTIC COMPOSITION OF THE PERENIAL TALL HERB „MEGAFORB” COMMUNITIES (MULGEDIO -ACONITETEA CLASS) IN ARGE§ COUNTY Valeriu ALEXIU Universitatea din Pitejti, str. Tärgu din Vale nr. 1, RO—110040, Pitefti, alexiuv@hotmail.com Abstract: Perennial tall herb “megaforb” growing on deep winter snowy edges, along the rivers, depressions, in primary or secondary forests, on mesic and moist soils rich in organic materials. In these groups meet plant taxa with different degrees of vulnerability. This paper presents 12 species of plants classified in three categories endangered. These species are classified into 7 plant associations. Vulnerable plant species are present in these plant communities: Gentiana punctata L. and Rhododendron myrtifolium Schott et Kotschy. These species are included in associations: Hyperico grisebachii-Calamagrostetum villosae Pawlowski et Walas 1949 and Triseto fusci — Salicetum hastatae Coidea (1986) 1990. Species are classified sozological groups, set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation. The system of preventive, protective and biotechnological methods of rare phytocenoses protection is proposed. Rare phytocenoses promote the conservation of vegetation biodiversity and support the phylocenogenetic process in the phytobiosphere. Keywords: flora, sozological categories, IUCN Red List, Arge? county, plant associations, Bern Convention, Habitats Directive. Introduction The information from the literature and personal researches in the field, shown the existance of 2009 species and subspecies in the Arges County. All these systematic categories belong to 584 genera and 144 botanical families. It are included in neither categories of the Red List, 309 species and subspecies being distributed by the following categories: rare, vulnerable, endemic to Romania, endemic to Romania not endangered, species having rare European specific spreading area, having endangered European specific spreading area (IUCN Red List, Habitats Directive Annex lib, IVb and Bern Convention — App I). For main sozological categories we made a presentation and integration chorology coenotic to indicate how to save and protect endangered species. Materials and methods The establishment of the protected plants was made on the basis: Red List of extinct endangered, vulnerable and rare higher plants of Romania flora (Bojcaiu N., Coidea Gh., Horeanu Cl., 1994), Rare vulnerable and endemic plants of Romania flora — The Red List (Dihoru Gh., Dihoru Alexandrina, 1994), The Red List of higher plants of Romania flora (Oltean M., Negrean MARI SI A, XXXI, p.21-24
