Spices are distinguished from herbs, which are leafy, green plant parts used for flavoring purposes. Herbs may be used fresh, and are commonly chopped into smaller pieces; spices, however, are dried and usually ground into a powder.
Herbs have a variety of uses including culinary, medicinal, or even spiritual usage. The green, leafy part of the plant is often used, but herbal medicine makes use of the roots, flowers, seeds, root bark, inner bark, berries and sometimes other portions. Usage differs between culinary herbs and medicinal herbs. Medicinal herbs may be shrubs or other woody plants, whereas a culinary herbs are non-woody plants.
Spices are the seeds, berries, bark, root, fruit, or other parts of the plant, even leaves in some cases; although these, as well as any edible fruits or vegetables, may be considered "herbs" in medicinal or spiritual use.
Culinary herbs are used in small amounts and provide flavor rather than substance to food.