You will find innumerable ethnobotanical publications through Google search. You must be working on tribal/common people of a certain place. You should mention that because it is of prime importance. You need to know how those people are utilizing the plants growing around them. You need to undertake field trips too.
There is another aspect. Some ethnobotanists compare the ethnobotanical uses of plants between different countries / continents. Are you doing such kind of study? You should elaborate the study for your thesis in order to get maximum help from RG members or you just want to see general papers on ethnobotany?
Sorry Sheena. In the initial stages of my service I undertook some ethnobotanical tours in some districts of West Bengal, India. From India, Dr. S. K. Jain is pioneer in this field.