Resumo. Manso’s region is located at 785m of altitude in Antônio Dias town, east of Minas Gerais State, Brazil, which is in the Atlantic domain in a formation of Seasonal Semideciduous Montane Forest. In the inventory of Mimosoideae of that region, it wase found nine taxa which are analyzed regarding the limits of geographic distribution and only the arboreal are evaluated as floristic relation indicators between the region of Manso and other areas of southeastern Brazilian Atlantic forest. They are: Senegalia martiusiana (Steud.) Seigler & Ebingler, Anadenanthera colubrina (Vell.) Brenan var. cebil (Griseb.) Altschul, Anadenanthera peregrina (L.) Speg, Inga vera subsp. affinis (DC.) T.D. Penn., Mimosa debilis Humb. & Bonpl. ex Willd. var. debilis, Mimosa pellita Humb. & Bonpl. ex Willd. var. pellita, Piptadenia gonoacantha (Mart.) J.F. Macbr., Plathymenia reticulata Benth. and Stryphnodendron polyphyllum . Five geographical distribution standards had been established: 1. Anfiatlântico (1sp.); 2. Neotropical (1sp.); 3. South America Occidental- Center-Oriental (4spp.); 4. Brazil Center-Oriental (2spp.); 5. Atlantic Brazil Northeast-Southeast (1sp.). The taxa according to their preference habitat were labelled as floristic general elements (100%) and specialist elements (0%) of the Atlantic domain. The results show greater similarity between Manso and the forest stretches located in high elevations. There are floristic similarities between the dense mountain rain and seasonal semideciduous southeastern forest, supporting the proposal of common origin of these phytophysiognomies.