Floristic inventory and diversity assessments are necessary to understand the present diversity status and conservation of forest biodiversity. Although, inventory and diversity studies are taken up at different levels all over the world by various research groups with available resources and to fill the gap in the biodiversity knowledge, there are variations in sampling methods/techniques, sample size, measurements taken in the field that hinder the compilation and comparison of results. This review discusses the problems and pitfalls in different sampling techniques, which are being followed in floristic inventory and diversity measurements.