According to scientific nomenclature, the name of each plant is composed of two elements: the first indicates the genus; the second indicates the species. The plant family, that is to say the higher category to which the genus belongs, is mentioned in parentheses, after the Latin name. The common or vernacular name of the plant is specified under the scientific name. If several names exist in popular vocabulary, they are indicated in their order of importance. The origins of the common name are also given in parentheses. Habitat and cultivation indicate the geographical origins of the plant, their current distribution; specifies their method of cultivation and harvesting, as well as the land which is suitable for them. Related species refer to plants of the same genus or family that most often have medicinal properties. Main constituents and main effects lists the active ingredients and lists the main medicinal effects of each plant on the body in their order of importance.