The herbarium Aluízio Bittencourt- HABIT, has the objetive to realize Botanical research and collect records, about the species of flora of Maranhão and from Brazil. The material that constitute the acquis originated from Cerrado, but have species of the more different vegetable formations of state. Currently the HABIT have an acquis of 10.200 sample, distributed between Bryophytes, Pteridophytes and Angiosperms. The acquis has the largest Bryophythes collection of Middle-North from Brazil, with approximated 4.000 sample. The HABIT currently is constituted for the physical space ample to the guard of collection, informatics room and register of specie, curator room, analysis and identification room; and deposit.