The site consists of high elevation vegetation in central Mediterranean basin, along the Apennines mountain range: xerophitic primary grassland (Pediculari elegantis-Seslerietum tenuifoliae) and mesophitic primary grassland (Luzulo italiacae-Festucetum macratherae), with important resident and migratory bird communities.
Six plots, each one 100 m2 large, grouped in two cluster-plots including each one three plots, representative of a larger area of 0,5 km2 ca., ranging from 2100 to 2300 m a.s.l. (alpic and Mediterranean high-mountain belts.