Diterpenes, Kaurane: A group of DITERPENES cyclized into four rings.Diterpenes: Twenty-carbon compounds derived from MEVALONIC ACID or deoxyxylulose phosphate.Fritillaria: A plant genus of the family LILIACEAE. Members of this genus produce imperialine, a steroidal alkaloid which acts at muscarinic receptors.Diterpenes, Abietane: A group of DITERPENES cyclized into 3-ring PHENANTHRENES.Diterpenes, Clerodane: A group of DITERPENES cyclized into 2-rings with a side-chain.Euphorbia: A large plant genus of the family EUPHORBIACEAE, order Euphorbiales, subclass Rosidae. They have a milky sap and a female flower consisting of a single pistil, surrounded by numerous male flowers of one stamen each. Euphorbia hirta is rarely called milkweed but that name is normally used for ASCLEPIAS.Caesalpinia: A plant genus of the family FABACEAE. The common name of "Bird-Of-Paradise" is also used for other plants such as Heliconia (HELICONIACEAE) and Strelitzia (STRELITZIACEAE) and some birds. The common name of "Cat's-Claw" is more often used with UNCARIA. The common name of "Pernambuco" also refers to a state in Brazil. Furanoditerpenoid lactones and caesalpin are produced by members of this genus.Salvia: A genus in the mint family (LAMIACEAE).Verbenaceae: A plant family of the order Lamiales, subclass Asteridae, class Magnoliopsida. The leaves are opposite or whorled. The flowers are aggregated in spikes, clusters, or racemes.Chamaecyparis: A plant genus of the family CUPRESSACEAE which should not be confused with other cedar and cypress trees of THUJA or CUPRESSUS genera.Cistus: A plant genus of the family CISTACEAE. The common name of rock rose is also sometimes used with the closely related Helianthemum genus (CISTACEAE).Cupressaceae: A plant family of the order Pinales, class Pinopsida, division Coniferophyta (conifers). They are mainly resinous, aromatic evergreen trees.Plant Bark: The outer layer of the woody parts of plants.Orthosiphon: A plant genus of the family LAMIACEAE that contains pimarane-type diterpenes. Several species of Orthosiphon are also called Java tea.Polyalthia: A plant genus of the family ANNONACEAE. Members contain 8-oxopolyalthiaine.Thymelaeaceae: A plant family of the order Myrtales, subclass Rosidae, class Magnoliopsida. They are mainly trees and shrubs. Many members contain mucilage and COUMARINS.Mikania: A plant genus of the family ASTERACEAE. Members contain scandenolide (a sesquiterpene lactone) and germacranolides.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Molecular Structure: The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.Plant Components, Aerial: The above-ground plant without the roots.Thuja: A plant genus of the family CUPRESSACEAE.Anthozoa: A class in the phylum CNIDARIA, comprised mostly of corals and anemones. All members occur only as polyps; the medusa stage is completely absent.Cryptomeria: A plant genus of the family TAXODIACEAE. Its POLLEN is one of the major ALLERGENS.Viburnum: A plant genus in the family CAPRIFOLIACEAE. The common name derives from its traditional use for menstrual cramps. It is a source of viburnine, valerianic acid, vibsanin, and ursolic acid. Note that true cranberry is VACCINIUM MACROCARPON.Sesquiterpenes, Guaiane: SESQUITERPENES cyclized into two adjoining rings, one being 7-carbons and the other is 5-carbons.