Attribution on this staff is difficult but it is most likely Makonde. The patina on the staff is well worn from use. The top of the staff is covered with brass tacks, but it appears that at one time there might have been a handle, which is now gone. The figure is wearing a jacket and I especially love the nice angular planes in the carving of the shoulders.
"Staffs had many functions, they were both status symbols and tools used by a wide range of specialists, such as headmen, leaders of lineages or associations, diviners, healers, exorcists, and witch hunters, in a variety of ways. Their form and iconography varied according to the ritualist to whom they belonged.” - Mwana Hiti by Marc L. Felix