| Summary: | Floristic-phytocenological research of weed vegetation in vineyards of Bosnia and Herzegovina determined a new association Convolvulo Polygonetum aviculare (ass. new). Regarding floristic character, the association was qualified by numerous thermophilic species, and it was ranked in the Mediterranean syntaxonomic unit Diplotaxion Br.-Bl. 1931 em 1936 from ordo Chenopodietalia mediterranea Br.-Bl. 1931 em 1936. Stands association builds 56 plant species. A complete set of association is built by five species: Convolvulus arvensis L., Polygonum aviculare L., Cynodon dactylon (L.) Pers., Portulaca oleracea L. and Chenopodium album L. Biological spectrum of association shows dominance of hemitherophytes (62,50%) and hemikryptophytes which together make up 85,71% of the species. Gradient analysis shows very little dependence of floristic composition in relation to soil moisture medium rich in minerals. The value of the coefficient of correlation points a relatively high degree of dependence floristic composition in comparison to the gradient of light and temperature. Areal spectrum of associations suggests the dominance of cosmopolitan and Mediterranean group of floral elements. By means of numerical classification and ordination of stands, there may be distinguished two groups of stands.
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