The article contains the results of the study of the environmental and biological features of Ph. tanacetifolia in four natural and territorial complexes of the Belgorod region. In all natural-territorial complexes Ph. tanacetifolia accompanied by dominant species such as: M. albus Medik., Ch. album L., E. canadensis L., E. repens (L.) Nevski, S. pumila (Poir.) Roem. & Schult., C. xanthiifolia (Nutt.) Fresen., L.amplexicaule L., M.lupulina L. The broad amplitude of variation is established by such morpho-biological indices of wild-growing individuals Ph. tanacetifolia as plant height (Cv = 34.8-46.7%), bush diameter (Cv = 43.2-54.5%), scape diameter (Cv = 67.1-78.4%), inflorescence length (Cv = 46.7-55.2%); 1000 seed’s weight (Cv = 25.4-37.4%); number of curls per plant (Cv = 49.2-63.5%); number of flowers in the curl (Cv = 33.4-42.7%); number of seeds in the inflorescence (Cv = 25.4-28.6%); seed productivity (Cv = 30.6-34.8%). The allocated wild-growing forms of a phacelia are included in collection nursery of a botanical garden of NRU «BelSU».


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