Iridio variegatae-quercetum pubescentis Pînzaru, Ccantemir et Bbelous ass. nova in the vegetation of the Republic of Moldova

Abstract

The association Iridio varigatae-Quercetum pubescentis Pînzaru, Cantemir et Belous consists of phytocenoses of downy oak (Quercus pubescens Willd.) with Hungarian iris (Iris variegata L.), West-Pontic, xerophilic, xeromesophilic, located on arid, sunny hills, on deep, leachate-chernozem soils or typical moderately humiferous soils, formed on clayey or sandy loams. The association has been identifi ed based on 30 relevés carried out by the authors. It includes Critically Endangered (CR) species, included in the Red Book of the Republic of Moldova: Centaurea angelescui Grinț., C. thirkei Sch.Bip., Chaerophyllum nodosum (L.) Crantz, Delphinium fi ssum Waldst. et Kit. and Serratula bulgarica Acht. et Stoj. The association Iridio varigatae-Quercetum pubescentis Pînzaru, Cantemir et Belous has been grouped in the alliance Quercion pubescenti-petraeae Br.-Bl. 1932, order Quercetalia pubescenti-petraeae Klika 1933, class QUERCO-FAGETEA Br.-Bl. et Vlieger in Vlieger 1937.