Green leafy vegetables , the most widely used medicinal plant in the market. Herbs are plants that are commonly used in food , flavoring , medicine, or perfumery. Spices are produced from these herbs for cooking. Usually fresh or dried leaves and flowering parts of the tree are used for this purpose. Spices are made from the seeds , fruits , bark , stems and roots of the tree. Medicinal plants are used for many purposes, such as cooking , medicine , and sometimes religious observances. Medicinal plants are called medicinal plants. No matter what is said, the name of the plant indicates its leaves , flowers , fruits , roots , seeds , bark , streaks and fruit peels.