Site of spiny restharrow (Ononis spinosa L. Fabaceae) in the south-western part of Poznan

The object of the work was population of spiny restharrow (Ononis spinosa) growing within the previous ecological site “Kopanina I” in the south-western part of Poznań. In total 67 specimens were found on the area of 825 m2. About half of them were in phase of flowering. Most of plants grew in clusters. They were a component of the meadow plant community of Molinio-Arrhenatheretea class with different degree of humidity. Together, there were 50 species of vascular plants, including two protected species. Analysis of ecological indicatory numbers revealed predominance of species connected with mineral-humus, mesoand eurotrophic, neutral or alkaine soils.