Meadows constitute more than 50% of the area of the Pisia valley. The flora existing in these meadows consists of about 200 species, of which 150 can be considered as typical of such habitats. The plants include 14 engendered, ...

The river Pisia is a left-bank tributary of the Ner flowing through the eastern part of the commune of Uniejów. The valley stretches over 11.8 km2, of which more than 50% is taken up by meadows, 30% by fields, 7% by forests ...