sentences:  Eurosiberian flora is not common in the region, and species such as the moor birch and the silver birch are restricted to very specific humid valley areas with special climate conditions.The climax vegetation in the "campiña" is the holly oak.Some of the species that take over when the holly oak forest degrades are the "sticky shrub", the , the French lavender, the "Thymus mastichina" and the "Thymus zygis".