Synanthropic species of vascular plants new and rare for the flora of the Ryazan region and the city of Ryazan

Information is provided on the finds of 47 rare species in the flora of Ryazan or the Ryazan region. Of these, 12 species and hybridogenic taxa were recorded for the first time in the region: Allium ramosum, Amaranthus powellii, Centaurea montana, Cerastium biebersteinii, Corispermum declinatum, Eragrostis albensis , Helminthotheca echioides, Muscari neglectum, Psephellus dealbatus, Rosa micrantha, Scutellaria altissima, Solanum villosum, Tilia × europaea. In addition to those listed, 14 more species are recorded for the first time for the Ryazan flora: Allium schoenoprasum , Anisantha sterilis, Bromus commutatus, B. japonicus, Carduus nutans, Chenopodium virgatum, Hesperis pycnotricha, Juncus tenuis, Koeleria glauca, Mycelis muralis, Phacelia tanacetifolia, Polygonum bellardii, Rumex stenophyllus, Triticum aestivum. Almost all species, with the exception of the archaeophyte Aethusa cynapium , are accidentally introduced neophytes (28 species) or wildings (17 species). Agropyron cristatum spreads along railways and becomes wild if used in lawn grass mixtures. Several species distributed in the south of the Ryazan region on the northern ( Carduus nutans, Poa bulbosa, Salvia verticillata ) or eastern border of the natural range ( Mycelis muralis ) are found in Ryazan as adventitious plants. It characterizes them as progressive species. Koeleria glauca falls into the same group, having a wider distribution as psammophyte in the northern and eastern parts of the region. Currently, 605 native (about 58%) and 442 (about 42%) species of vascular plants are known in Ryazan.