1. Identification and nomenclature of plants	2. Source of income
3. Identification of medicinal plants 5. Place of planting and choice of planting 7. Management of forest 9. Flora of specific regions 11. Landscape gardening	4. Identification of toxic plants 6. Artificial hybridization and development of new species 8. Evolutionary trends 10. Adverse effect of changed environment 12. Aesthetic value