Floristic investigations carried out in selected study areas of Rybnicki Okręg Węglowy (Rybnik Coal Area) make it possible to describe the potential and current practical application of quite a numerous group of medicinal species of vascular plants in phytotherapy and prevention of various disorders. An example analysis has been carried out on the basis of prevention and treatment of prostatic hypertrophy Hypertrophia prostatae We have described medicinal plants used in benign prostatic hyperplasia.