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

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