 La Payunia is home to the many volcanic cones, being noteworthy the Payún Matrú volcano.The Flora is represented by matorrales, prairies, native mountain species and other typical patagonian plants such as "Adesmia pinifolia", "Festuca pallescens", "Grindelia chiloensis", "Ephedra ochreata miers", "Neosparton ephedroides grisebach", "Psila spartioides", "Prosopis denudans" (between 500 and 1,300 m AMSL) and "Schinus poligamun" and "Larrea nítida cavanilles" (between 1,800 and 2,850 m AMSL).Over 70 animal species have been documented on the reserve.