300 lichens, about 150 bryophytes (mosses and liverworts), and about 100 species of Myxomicetes, for a total of approximately 2,700 infrageneric taxa.The geomorphology makes it unique in the Trieste Karst: agriculture was and is limited to small areas of flysch such as near Botazzo, grazing is today almost completely abandoned and even in the past it was made difficult by the steep and stony slopes.The climbers who use the rock walls as a school have wrongly compared it to an "alpine" landscape, whereas it rather recalls the great valleys of Dinaric Dalmatia, with the major forms of erosion and the alternation of shrubs and almost bare surfaces; also the geologic structures are similar, with fissured limestone, scree, etc., the species are often the same and grow in similar associations.In the Rosandra Valley the relationships between vegetation and physical factors are clearer than in the Alps, where the complicated orography and the presence of many types of rocks create a complex pattern of ecosystems.In the Rosandra Valley the landscape can be read easily, because of the modest development of the reliefs and presence of only two dominant types of substrate: limestone and flysch.
