Ethnobotany: This is the study of relationship between tribals and plants. Ethnobotany is from "ethnology" - study of culture or "botany" - study of plants. This is the scientific study of the relationships which exist between people & plants.
Ethnobotanists aim to describe, document or explain complex relationships between cultures and uses of plants that is focusing primarily on how plants are used, managed or perceived across human societies like as foods; as medicines; in cosmetics; in divination; in construction; as tools; in dyeing; as textiles; as currency; as clothing; in rituals; in literature; or in social life.