The vegetation of this region has been strongly conditioned by thousands of years of agricultural activities, favored by the presence of both appropriate lands for the cultivation of cereal and suitable morphological characteristics. Around the small towns that dot the region, there are countless almond orchards, olive groves, and vineyards that fill the landscape.
The scarcity of tall trees has a historical explanation precisely in this vocation, so the forest top is extremely fragmented. The remaining important forest areas cover the steep slopes of the mountains, where the terrain restricts its agricultural use, and the summit area of the Giara, where there are still vast cork and oak forest that are interrupted by dense Mediterranean vegetation, including arbutus, myrtle, mastic, and helichrysum.
In the spring, asphodels, hawthorns, rockroses, anemones, and buttercups, which cover the surface of the paùlis, bloom simultaneously. Approximately 350 plant species have been identified. Along with several species of buttercups – Ranunculus revelierei, Ranunculus cordiger, Ranunculus aquatilis, Baldellia ranunculoides and the extremely rare Ranunculus ololeucos – there are also some species that are endemic to Sardinia and Corsica, such as Morisia monanthos, Pancratium illyricum, Genista corsica, and Romulea requienii. Most of these species can be seen in the Morisia Botanical Garden, which covers about 2 hectares and contains almost all the species of shrubs and trees that exist in the Giara.