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The current distribution of Rosa gorenkensis in Poland is presented. The species is found on 16 sites mainly in the eastern part of the country. Evidence that the species has a large invasive potential is also presented.
Carex humilis is one of the rarest vascular plants in Lower Silesia. It has been observed only on 5 locations: 1 in the lowland and 4 in Sudety Foreland. 2 of them have historical value only. Existing populations are small and isolated, moreover, shaded plants hardly produce seeds. The species is critically endangered.
Two new for Wrocław localities of Artemisia annua L., the species not recognised since 1976 in this city, has been found. The plant grew on a sack with sand, on railway and on a new sidewalk near a church. Formerly it was reported within Wrocław city limits several times, usually from rubbish. This paper presents short description of this species, its ecological and climatic requirements, information...
Botrychium matricariifolium (Retz) A. Braun ex W. D. J. Koch has been noticed on 34 localities in Lower Silesia. It is one of the most endangered elements of the flora of Lower Silesia now – only 3 sites of the species have been observed during 30 years.
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