Сhrysaspis patens and Сh. patens × Сh. campestre (Fabaceae) іn the flora of Ukraine

Data about distribution of Сhrysaspis patens (Schreb.) Holub (Trifolium patens Schreb.) and Сh. patens × Сh. campestre (Schreb.) Holub (T. patens × T. campestre Schreb.) (Fabaceae Lindl.) in the Ukrainian flora are analyzed. For the first time, according to LE and KW Herbarium materials, in 1990 and 1996, the species, Сh. patens, was noted by Yu. Roskov from the territory of Transcarpathian Region (Zakarpats’ka Oblast’): in the vicinity of the village of Malyi Bereznyi of Velykyi Bereznyі District (1954), and village Lazy (1958) of Uzhgorod Distr., later – between villages Nevytske and Kamianytsa (1970, 1972) of these district of the Region. One specimens from the Malyi Bereznyi (LE) was determined by Yu. Roskov as hybrid: Сh. patens × Сh. campestre. Before 2019 in Checklist and regional flora’s these taxa was not mentioned. Traditionally, the species is considered as part of the sect. Сhrysaspis of genus Chrysaspis Desv. or sect. Chronosemium Seringe subgen. Chronosemium (Seringe) Hossain of the genus Trifolium L. Taxonomically, the species is close to Сh. campestris. The main distinguishing features between these species are: morphological characteristics of vegetative and generative organs, mainly size and form of leaves and parts of flower. Taxonomic citations, morphological characteristics, primary and secondary areas, ecological and coenotic peculiarities of Ch. patens are given. The general area of the species is including Middle Europe, Mediterraneum and Asia minor; at the last years species was noted from the territory of Azerbaijan, Finland and New Zealand. The species grows on meadow, among shrubs, in wet and rocky places, on pastures, along roadsides and railway tracks, etc. In the South European country Ch. patens is a characteristic species of cl. Molinio-Arrhenatheretea Tuxen 1957. The florogenetic status of the species is discussed, in particular in the Transcarpathia region, as well as in the neighboring Hungary and Slovakia Ch. patens is considered as element of native fraction of the flora. At the northern parts of species distribution range, e.g. in Poland, Germany, etc. the species is a kenophyte. A schematic map of the distribution of the species in the Transcarpathia region is given.