The book presents mainly the plant genetic resources of Teknaf wildlife sanctuary(TWS), Bangladesh. The authors tried to focus existing plant genetic resources in the sanctuary & to assess the plant biodiversity and to analyze vegetation in selected zones of TWS. They have presented a total of 534 plant species under 102 families. Among the 534 species, 19 species belong to threatened categories of Bangladesh. The sanctuary supports maximum 385.5 tree individuals/ha. The values of Shannon Weiner Function and Simpson's index are 3.33 and 0.22 respectively while Concentration of Dominance is 2.11. Dipterocarpus turbinatus, a good timber yielding tree, is the dominant species attaining the peak value. Population structure data of leading dominant trees display variations. At the end they have made some recommendations for future genetic resources conservation and management action plans in the sanctuary area. Concentric zoning model has been proposed here for such a plan.