Chemotherapy has been a great improvement in Pharmacology, but side effects have originated a tendency toward a natural approach, especially within the plant kingdomand this lead us to his investigation. As a first and second step in the study on Native Plants Used in Folk Medicice in Paraguay (Part I and II) 100 species were identified proving they belong to different families usable against different disease. This time (Part III) 50 more species have been identified. Data were compiled on disease curing plants which were collected and identified by species, sample of unich are kept in the collection of the Faculty of Chemistry of the National University. It is hoped that this work will be a starting point for future Chemical and Farmacological investigations.