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The paper indicates the phytocenoses most rich in bee taxons and occurring in habitats located along railway lines crossing Lublin Upland. To date, in the study area 124 basic phytocoenoses have been discovered, described and classified into 12 different synecological groups. Among 52 phytocoenoses, the participation of bee flora was considerable. Most voluble phytocoenoses represent ruderal and segetal associations (Ariern is ie tea vulgaris, Stellarietea mediae classes - 87 species), meadow and pasture associations (Mollinio-Arrhenatheretea - 56 species), psammophilous and xerothermic grasslands (Festuco- Brometea, Koelerio glauce-Corynophoretea canescensis - 38 species), thermophilous forest edge communities and thickets (Trifolio-Geranietea and Rhamno-Prunetea - 33 species). Significantly fewer melliferous and polleniferous taxons were noticed in mesophilous deciduous forests or thermophilous oak forests - 29 species. Most simple in structure and species richness are associations with Rumex acetosa, Reseda lutea, Linaria vulgaris, Papaver rhoeas, Cirsium arvense, Oenothera biennis, Viola arvensis and Potentilletum anserine or Sisymbrietum altissimi. The communities form patches (15-20 m² ) with 80-100% cover of the diagnostic taxon and are of low or medium stability. The most persistent and floristically stable are Tanaceto Artemisietum, Rudbeckio-Solidaginetum, Echio-Melilotetum, Sambucetum nigrae, Rubo fruticosi-Prunetum spinosae and communities with Rosa rugosa, Rubus caesius, Geranium robertianum, Pastinaca sativa, Trifolium medium or Euphorbia cyparissias. The maintenance of the mosaic of phytocoenoses in anthropogenically transformed habitats, including those along railway lines, is of decisive importance for the protection of floristic diversity and adaptation processes of Apoidea.
A wide range of ecological conditions on anthropogenic sites makes it easy for different usable species to infiltrate and spread there. The data were collected since 1998. The spontaneous flora of railway areas of the central-eastern part of Poland is composed of already recorded 950 vascular plants, of which 373 are recognized as usable, including 78 dye plants, 162 medicinal, 324 nectariferous or polleniferous taxons. The majority of taxons are distributed in disperse (128 species 34%) or occur rarely (96 species 26%). The common or frequent species constitute 40% of usable flora of the studied area. Medicinal and melliferous plants occur most frequently on slopes of trenches and railway embankments in nearly natural habitats. They mostly grow as single individuals or form loose and rarely dense patches. The analysis of their geographical status confirms the ultimate prevalence of apophytes over anthropophytes. Considering syntaxonomic structure, there are mainly species typical for phytoceonoses from Molinio-Arrhenatheretea, Artemisietea vulgaris, Stellarietea mediae, Festuco-Brometea, Querco-Fagetea classes.
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