Ecological and biological aspekt new locality of Drosera anglica Huds. near Końskich
<p>The work concerns the occurrence conditions <em>Drosera anglica.</em> (EN) within the site located 10 km from the village of au nord Końskie near the Czarna River. The species is very dispersed but in a few places the density was 5-10 of specimens per 1m<sup>2</sup>. This species grows within a patch which is poor in terms of its flora. No significant expansion of trees or shrubs has been noted. This is related to quite a high level of water. Such conditions are favourable to the development of another species under threat of extinction, <em>Rhynchospora alba. </em>Plant-based patches with participation of sundew are heterogeneous in terms of syntaxonomy. Presence of species has been observed, e.g. from the classes of <em>Phragmitetea </em>and <em>Scheuchzerio-Caricetea nigrae</em>. Soil analyses indicate that the soils under observation are not very acidic, with average content of CaO and ash content which is optimal for this species with the ratio of C:N which indicates a temporary mire. The content of heavy metals is in norm and poses no threat to the surroundings (Pb 64-65 ppm, Cd 2.7-2.9 ppm). Wide ranges in the analysed samples refer to chromium. They do not have an adverse effect on the development of <em>Drosera anglica</em>. A very crucial threat is the consequence of succession, competition and hydrological conditions.</p>