Chorological, ecological and coenotical features of Peucedanum latifolium Dc. (Apiaceae Lindl.) on the territory of Chernivtsy Region

Chorological features of Peucedanum latifolium DC., a species required regional protection, are reported. According to the literature and herbarium collections there eight locations known for the species on the territory of Chernivtsi region, that are concentrated in the Prut river valley within Novoselytsya district. To date, only two of these locations are identified, while the existence of other localitates requires confirmation. Most probably they are lost due to high level of antropogenic transformation of the area. In Chernivtsi region rare and small population of P. latifolium is assigned to the unique meadow communities concentrated along the railway line near the village Vanchikivtsi, where rare representatives of regional halophytic flora are preserved. Using synphytoindication method employing standardized fitoindication scales ecological charachteristics of groups involving P. latifolium are determined. It is shown that in the investigated region P. latifolium in relation to acid soil regime is a subacidofyl (8.21), in relation to the generalized soil salt regime it belongs to the group semievtroves (7.95), in relation to the content of digestible forms of nitrogen the species is heminitrofil (5.29), in relation to the water regime of soil - mesophytic (10.55), and in relation to the content of carbonates in the soil it belongs to the group acarbonatefyl (6,88). In relation to the thermal regime of climate P. latifolium is attributed to the group of submezoterms (8,40); in relation to the continental climate it belongs to hemicontynentals (8,68); in relation to the severity of winters P. latifolium is subcriofit (on a freezing scale -14 ° C - -10 ° C) (7,73). It should be noted that the limits of tolerance for P. latifolium towards edaphic factors in the region are investigated within the environmental amplitudes referred to Ukraine (Didukh, 2011). In terms of Chernivtsi region P. latifolium is stenotopnic species that forms numerous population in a relatively small area in particular, specific, unique for this region habitat types. Given the limited distribution of P. latifolium in Ukraine and high value of sozological groups for his participation, we propose to include it into the regional list of rare and endangered plant species.