The plants growing in these bogs are mainly "Polytrichum" mosses, "Potentilla erecta", "Pinguicula vulgaris", "Vaccinium myrtillus", "Calluna vulgaris", and also "Drosera rotundifolia", a carnivorous plant that doesn't grow further south in Western Europe. "Centaurea pinnata" is an endangered species of plant present in the Sierra de Vicort and Sierra de Santa Cruz mountain ranges. The Sistema Ibérico comprises several mountain ranges and massifs:  The main peaks of the system are: Moncayo (2,313 m), Monte San Lorenzo (2,262 m), Pico de Urbión (2,228 m), Peña Cebollera (2,129 m), Javalambre (2,020 m) and Peñarroya (2,019 m). Other locally important summits are Cerro Calderón (1,837 m), Mont Caro (1,441 m), Tossal d'Orenga (1,144 m) and Montegordo (837 m),  The Sistema Ibérico is not as high as other mountain systems in Spain. It is, however, very significant from the hydrographic point of view for important rivers of the Iberian Peninsula have their source in its mountains, which divide the Atlantic from the Mediterranean watershed. The following rivers rise in the Sistema Ibérico: