The Importance and nature of plant products -- Industrial plants and plant products: Fibers and fiber plants -- Forest products: wood and cork -- Forest resources -- Tanning and dye materials -- Rubber and other latex products -- Gums and resins -- Essential oils -- Fatty oils and waxes -- Sugars, starches, and cellulose products -- Drug plants and drugs: Medicinal plants -- Fumitories and masticatories -- Food plants: The History and nature of food plants -- The Major cereals -- The Minor cereals and small grains -- Legumes and huts -- Vegetables -- Fruits of temperate regions -- Tropical frutis -- Spices and other flavoring materials -- Beverage plants and beverages

1. Botany
2. Economic