The vegetation flora is the set of plant species in an area. The Iberian Peninsula is part of the Holarctic kingdom, which includes the mainland north of the Tropic of Cancer and has three floral regions: alpine and boreal region, the Euro-Siberian and the Mediterranean region. . the vegetation consists of plant formations. The three basic types are the forest, scrub and grassland. Spanish vegetation has a great diversity of species among which are: physical factors as the existence of different climates, relief and soils: and the bridge position of the Peninsula, human factors as the introduction of interest for their economic value, or degradation of existing vegetation. The vegetation of the maritime climate is for the Euro-Siberian floristic region. Its vegetation characteristics deciduous forest, the heath and meadow. The deciduous forest is made up of tall trees, With smooth, straight trunk and large leaf falling in autumn. The evil has tolerated the heat and cold very well and requires high humidity, so it is an oak tree does not support montaña.El hot summers, cold tolerance is smaller and requires less moisture than there is at what is in lower altitudes. The chestnut is a secondary vegetation formation that has gained ground at the expense of oak, allowing the use of its fruit and its made ra. In the area of ocean climate appears rebollo and gall forest with tall trees that keep their less dry leaves to the birth of the new outbreak. Throughout the time has gone extensive areas of deciduous forest. At present large areas have been replanted with fast growing trees and good economic use, such as pine or eucalyptus. The moor is a dense thicket vegetation whose height can be low or reach four meters. Its most abundant species are heather, gorse and broom. Meadows occupy large tracts in the oceanic landscape nicos. These abundant herbaceous vegetation and grasslands.
The vegetation of the Mediterranean climate is distinguished by evergreen forest and scrubland. These formations have been taken in the summer drought, through various schemes. The forest consists of evergreen trees of medium height, with straight trunks not thick, rough bark, its branches and large globular create layers. The oak tree is the most characteristic and widespread Mediterranean climate. It is drought tolerant and adapts to all soil types. The cork needs mild winters, some moisture and soils that silicon is concentrated in the Southeast. Pine is a secondary plant formation condi tion is adapted to extreme cold, heat, humidity and dryness, as well as different soils. The Mediterranean maquis is not a climax formation, but the result of forest degradation by human action. It has three characteristic types: the bush is a dense shrubbery, La garrigue shrubs and bushes made up of low rise and the steppe is located in the semiarid region of southeastern peninsula and the valley of the Ebro The vegetation of banks, along rivers the soil is impregnated with moisture, so this space is outside the dry character. The riverine forests consist of species such as alder, Willow, poplar and aspen. The landscape in the mountains, the vegetation has floors that have vegetation vary depending on the height. Alpine or Pyrenean mountain is represented by the Pyrenees. Above the forest of oak or oak, can be distinguished are three floors. the subalpine level between 1200 and 2400 m, meets natural conifer spruce. The alpine, between 2400 and 3000 m, is the domain of nival pasto.piso above 3000 m the vegetation is absent. The rest of the peninsular mountains of lack of subalpine conifers