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EN
Deptford pink Dianthus armeria L. is a representative of Caryophyllaceae family. It is plant species that is strictly protected since 2014. In the local Red List for the Silesian Province it was considered an endangered species. During 2023-2024 fieldwork was done that aimed to update the list of the localities of this species in the Cieszyn Foothills region. The locality was marked on the map using methodological assumptions of Atlas of Distribution of Vascular Plants in Poland. The density of population was counted or estimated. As a result of the field studies in the study area 9 localities (a total of 17 local populations) of Dianthus armeria were found in grassland, meadow, fringe and ruderal communities. Totally 8 localities were new to this area. Only localities from Tuł Mt has been known earlier. There were also the highest abundance of population, estimated at 600-700 individuals but population contain several small populations that amounting from tens to several hundreds of plants. Two populations are in Cisownica village and they occupy slopes of two local mountains: Kopieniec Mt (475 m a.s.l.) and Malcowa Mt (510 m a.s.l.). In Cieszyn population grows close to the nature reserve “Kopce”, and ecological use are “Łąki na kopcach”. In Leszna Górna village populations occupy xerothermic grasslands. The other situation is Górki Wielkie where the species grows in ruderal habitats: levees along Brennica river and in the vicinity of market. The other human-made habitats which were grown by Dianthus armeria were found in Puńców. These ones were abandoned quarry of dolomites and the vicinity of sports field but close to the fring of oak-hornbeam forest. In general, the population in the Cieszyn Foothills, size ranged from a few individuals to approximately several hundred. The lack of accurate data from previous years does not allow to assess the dynamics of the distribution and abundance of this species. Based on the general trends of Dianthus armeria in Poland, the population status appears to be satisfactory.
EN
The semiparasitic plant common fir mistletoe Viscum album L. subsp. abietis (WIESB.) JANCH is the rarest of three subspecies in Poland. In the country this mistletoe has northern border of distribution range. The previous literature data suggested that the subspecies has only few localities in the Silesian Foothils and in northern part of the Silesian Beskid Mts (southern Poland) and in addition, some of them were not confirmed. Mistletoe Viscum album subsp. abietis has been reported to increase its range and abundance in Europe recently therefore authors decided to update the distribution data of the subspecies the aforementioned area. The data about distribution of host tree silver fir Picea abies was taken from forest database and from personal communication with foresters. The area was search to find localities of the individuals on trees. In case of the single specimens on fir trees binoculars were used. In total 39 localities were given including more than 30 new localities when compared to literature data from 20th century. In Silesian Foothils there are 20 localities and 19 stands in the Silesian Beskid Mts. On the localities the abundance of individuals ranged from single plants on one tree to massive infestation of several dozen of fir trees. The common fir mistletoe distribution seems to be an underestimated in the southern part of the Silesian Voivodeship, it is highly probable that its next localities will be found in nearest future. Despite the category endangered “EN” in the Red Book of Plants of the Silesian Voivodship the species is not threatened anymore. On the contrary it becomes to pose a serious threat to silver fir because it can contribute to decline of trees. During the massive infestation of firs by mistletoe, fir trees often die gradually. The obtained new information will allow for a better recognition of the current species distribution and a possible revision of the threat category of common fir mistletoe in the territory of Silesian Voivodeship. For a more detailed analysis of the degree of expansion of this species, it would be advisable to examine the number of individuals and study the development of mistletoe over time on the host on randomly selected trees.
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