摘要：Four ruderal associations have been identified on set-aside grounds and roadsides,in areas between cropped fields around Novi Beograd (Belgrade's Srem side) and Zemun,and along the Sava River embankment.Two of them,presented in this article,belong to the following higher syntaxonomic ranks: Class ARTEMISIETEA VULGARIS Lohm.apudTx.1947.Order Artemisietalia vulgaris Lohm.apud Tx.1947.Alliance Arction lappae Tx.(1937) 1942 em.Glitte 1972.Ass.Samkucetum ebuli Felf.1942.Ass.Asclepietum syriacae ass.nova The paper provides full symmorphological,synecological and syntaxonomic description of the two associations.
关键词：eastern Srem;ruderal vegetation;symmorphology;synecology;syntaxonomy;floristic composition;life-forms;floristic elements
