The present work is mainly based on information gathered from the interview with the "Tribal and local people" on the plants having economic importance to them. Relevant plants were collected from the study area, identified and preserved at the Herbarium of the Department of Botany, Rajshahi University.
The present investigation is divided into two parts:
Part-I. Interview with "Tribal and local people", collection, study, identification and preservation of plants: First step was interviewing the "Tribal and local people" about the plants they used in their daily life. These included the plants that have some economic importance as fruits, vegetables, furniture, drug, etc. Collections were made throughout the year and particular care was taken not to miss the flowering stages or the fruits. In all cases multiple sets of collections were made. During collection attempts were made to know the local names of the plants. All field data that cannot be observed from the herbarium specimen e.g. date, collection number, habitat, uses and distribution were recorded. Herbarium sheets were prepared in multiple sets and flowers were preserved in 70% alcohol for future study. Publication of Agharkar (1991), Ahmed (2008), Alam (1992), Anisuzzaman (2007), Bhattachariya (1989), Biswas (1973), Dey (1996), Ghani (1988, 1998), Hassan (1988, 1993), Hooker (1877), Huq (1986, 1986), Koche et al. (2008), Khan (1975, 1998), Khan et al. (2002), Kirtikar (1987), Prain (1903) and Rahman (2008, 2009, 2010, 2011, 2012), Roy et al. (2008), Sing (1998-2001) were consulted for identification and information about of medicinal uses of the taxa.
Part-II. Study of ethnobotanical aspects: For the present investigation interviews were taken from the "Tribal and local people" in the study area about different aspects, i.e. a) Holding numbers, b) Owner of the house, c) Family members and age groups d) Source of income, e) List of plants used by them, f) Purpose of use, g) How much amount they used, h) Method of use, i) From where they get the plants and j) Abundance of the plants.