Abstract
The so-called Mid-North region of Brazil, located mainly in the state of Maranhão, extends from the 6 degrees south, 42 to the 46 west and is limited by the Atlantic Ocean to the North. The region has a complex landscape, due to the contact between the Caatinga, Amazon and Cerrado biomes, the latter a biodiversity hotspot. It brings together unique phytogeographic and climatological chara…