Jurinetea stoechadifoliae Pînzaru cl. nova on the Pontic-Balkan limestone hills

Abstract

As a result of the research conducted, the vegetation of the Pontic-Balkan limestone hill areas, has been separated in a new class – JURINETEA STOECHADIFOLIAE Pînzaru, cl. nova. It consists of pioneer, xerophilous, calcicolous phytocoenoses, characterized by the predominance of chamaephyte species. The class JURINETEA STOECHADIFOLIAE Pînzaru included 2 orders and 4 alliances: Ord. Seselietalia besseriani Pînzaru ord. novo, hoc loco with the alliances Pimpinello-Thymion zygioidis Dihoru 1970 and Genisto tetragonae-Seselion besseriani Pînzaru 1997 corr. h. l. and Ord. Thymo calcareiHy ssopetalia montani Didukh 1989 corr. hoc loco, with two alliances: Euphorbio petroph ilae-Thymion calcarei Didukh 1989 corr. h. l., Sileno spergulifoliae-Artemision hololeucae Didukh 1989 corr. h. l.