Vaccinium: A plant genus of the family ERICACEAE known for species with edible fruits.Vaccinium myrtillus: A plant species of the family VACCINIUM.Vaccinium vitis-idaea: A plant species of the genus VACCINIUM.Vaccinium macrocarpon: A plant species of the family VACCINIUM known for the sour fruit which is sometimes used for urinary tract infections.Blueberry Plant: Several plant species of the genus VACCINIUM known for the edible blueberry fruit.Arctostaphylos: A plant genus of the family ERICACEAE.Anthocyanins: A group of FLAVONOIDS derived from FLAVONOLS, which lack the ketone oxygen at the 4-position. They are glycosylated versions of cyanidin, pelargonidin or delphinidin. The conjugated bonds result in blue, red, and purple colors in flowers of plants.Ericaceae: The heath plant family of the order Ericales, subclass Dilleniidae, class Magnoliopsida that are generally shrubs or small trees. Leaves are alternate, simple, and leathery; flowers are symmetrical with a 4- or 5-parted corolla of partly fused petals.Arctic Regions: The Arctic Ocean and the lands in it and adjacent to it. It includes Point Barrow, Alaska, most of the Franklin District in Canada, two thirds of Greenland, Svalbard, Franz Josef Land, Lapland, Novaya Zemlya, and Northern Siberia. (Webster's New Geographical Dictionary, 1988, p66)Iridoid Glycosides: A subclass of iridoid compounds that include a glycoside moiety, usually found at the C-1 position.Fruit: The fleshy or dry ripened ovary of a plant, enclosing the seed or seeds.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.