many xique xique cacti pilosocereus gounellei and sertao/caatinga landscape - oeiras, piaui northeast brazil

abundance backcountry background beautiful biome brazil brazilian caatinga cactaceae cacti cactus cactuses caryophyllales cerrado dry endemic environment gounellei green hinterland interior landscape many native natural nature northeast northeastern oeiras outdoor piaui pilosocereus plant polygonus sandy semiarid sertao sertaocaatinga sky summer sunlight travel typical vegetation view white wonderland xique xiquexique