Vaccinium vitis-idaea
Vaccinium vitis-idaea, the lingonberry, partridgeberry, mountain cranberry or cowberry, is a small evergreen shrub in the heath family Ericaceae, that bears edible fruit. It is native to boreal forest and Arctic tundra throughout the Northern Hemisphere, from Europe and Asia to North America. Lingonberries are picked in the wild and used to accompany a variety of dishes in Northern Baltoscandia, Russia, Canada and Alaska. Commercial cultivation is undertaken in the U.S. Pacific Northwest and in many other regions of the world. Names. "Vaccinium vitis-idaea" is most commonly known in English as 'lingonberry' or 'cowberry'. The  name 'lingonberry' originates from the Swedish name for the species, and is derived from the Norse , or heather. The genus name "Vaccinium" is a classical Latin name for a plant, possibly the bilberry or hyacinth, and may be derived from the Latin , 'berry'. The specific name is derived from Latin ('vine') and , the feminine form of (literally 'from Mount Ida', used in reference to raspberries "Rubus idaeus"). There are at least 25 other common English names of "Vaccinium vitis-idaea" worldwide, including: Description. "Vaccinium vitis-idaea" spreads by underground stems to form dense clonal colonies. Slender and brittle roots grow  from the underground stems. The stems are rounded in cross-section and grow from in height. Leaves grow alternately and are oval, long, with a slightly wavy margin, and sometimes with a notched tip. The flowers are bell-shaped, white to pale pink, long, and produced in the early summer. The fruit is a red berry across, with an acidic taste, ripening in late summer to autumn. While bitter early in the season, they sweeten if left on the branch through winter. Conservation status in the United States. The plant is endangered in Michigan. The "minus" subspecies is listed as  a species of special concern and believed extirpated in Connecticut. Ecology. "Vaccinium vitis-idaea" keeps its leaves all winter even in the coldest years, unusual for a broad-leaved plant, though in its natural habitat it is usually protected from severe cold by snow cover. It is extremely hardy, tolerating temperatures as low as or lower, but grows poorly where summers are hot. It prefers some shade (as from a forest canopy) and constantly moist, acidic soil. Nutrient-poor soils are tolerated but not alkaline soils. Varieties. There are two regional varieties or subspecies of "V. vitis-idaea", one in  Eurasia and one in North America, differing in leaf size: Cultivation. Lingonberry has been commercially cultivated in the Netherlands and other countries since the 1960s. Empress Elizabeth ordered lingonberry to be planted all over Peterhof in 1745. Some cultivars are grown for their ornamental rather than culinary value. In the United Kingdom, the Koralle Group has gained the Royal Horticultural Society's Award of Garden Merit. Culinary uses. The berries collected in the wild are a popular fruit in northern, central and eastern Europe, notably in Nordic countries, the Baltic states, central and northern Europe. In some areas, they can  be picked legally on both public and private lands in accordance with the freedom to roam. The berries are quite tart, so they are often cooked and sweetened before eating in the form of lingonberry jam, compote, juice, smoothie or syrup. The raw fruits are also frequently simply mashed with sugar, which preserves most of their nutrients and taste. This mix can be stored at room temperature in closed but not necessarily sealed containers, but in this condition, they are best preserved frozen. Fruit served this way or as compote often accompanies game and liver dishes. In Sweden, Finland and  Norway, reindeer and elk steaks are traditionally served with gravy and lingonberry sauce. Preserved fruit is commonly eaten with meatballs, as well as potato pancakes. A traditional Swedish dessert is (literally 'lingonberry pears'), consisting of fresh pears which are peeled, boiled and preserved in (lingonberry juice) and is commonly eaten during Christmas. This was very common in old times, because it was an easy and tasty way to preserve pears. In Sweden and Russia, when sugar was still a luxury item, the berries were usually preserved simply by putting them whole into bottles of water. This was known as (watered  lingonberries); the procedure preserved them until next season. This was also a home remedy against scurvy. This traditional Russian soft drink, known as "lingonberry water", is mentioned by Alexander Pushkin in "Eugene Onegin". In Russian folk medicine, lingonberry water was used as a mild laxative. A traditional Finnish dish is sautéed reindeer () with mashed potatoes and lingonberries on the side, either raw, thawed or as a jam. In Finland, whipped semolina pudding flavored with lingonberry () is also popular. In Poland, the berries are often mixed with pears to create a sauce served with poultry or game. The berries can also  be used to replace redcurrants when creating Cumberland sauce. The berries are also popular as a wild picked fruit in Eastern Canada, for example in Newfoundland and Labrador and Cape Breton, where they are locally known as partridgeberries or redberries, and on the mainland of Nova Scotia, where they are known as foxberries. In this region they are incorporated into jams, syrups, and baked goods, such as pies, scones, and muffins. In Sweden lingonberries are often sold as jam and juice, and as a key ingredient in dishes. They are used to make Lillehammer berry liqueur; and, in East European  countries, lingonberry vodka is sold, and vodka with lingonberry juice or "mors" is a popular cocktail. The berries are an important food for bears and foxes, and many fruit-eating birds. Caterpillars of the case-bearer moths "Coleophora glitzella", "Coleophora idaeella" and "Coleophora vitisella" are obligate feeders on "V. vitis-idaea" leaves. In Indigenous North American cuisine. Alaska natives mix the berries with rose hip pulp and sugar to make jam, cook the berries as a sauce, and store the berries for future use. The Dakelh use the berries to make jam. The Koyukon freeze the berries for winter use . Inuit dilute and sweeten the juice to make a beverage, freeze and store the berries for spring, and use the berries to make jams and jellies. The Iñupiat use the berries to make two different desserts, one where the berries are whipped with frozen fish eggs and eaten, and they mash raw berries with canned milk and seal oil. They also make a dish of the berries which is cooked with fish eggs, fish (whitefish, sheefish or pike) and blubber. The Upper Tanana boil the berries with sugar and flour to thicken; eat the raw berries, either plain or mixing  them with sugar, grease or the combination of the two; fry them in grease with sugar or dried fish eggs; and make them into pies, jam, and jelly. They also preserve the berries alone or in grease and store them in a birchbark basket in an underground cache, or freeze them. Use of the "minus" subspecies. The Anticosti people use the fruit to make jams and jellies. The Nihithawak Cree store the berries by freezing them outside during the winter, mix the berries with boiled fish eggs, livers, air bladders and fat and eat them, eat the berries raw as  a snack food, and stew them with fish or meat. The Iñupiat of Nelson Island eat the berries, as do the Iñupiat of the Northern Bering Sea and Arctic regions of Alaska, as well as the Inuvialuit. The Haida people, Hesquiaht First Nation, Wuikinuxv and Tsimshian all use the berries as food. Nutritional properties. The berries contain plentiful organic acids, vitamin C, vitamin A (as beta carotene), B vitamins (B, B, B), and the elements potassium, calcium, magnesium, and phosphorus. Traditional medicine. In traditional medicine, "V. vitis-idaea" was used as an apéritif and astringent. The Upper Tanana ate the  berries or used their juice to treat minor respiratory disorders. Other uses. The Nihithawak Cree use the berries of the "minus" subspecies to color porcupine quills, and put the firm, ripe berries on a string to wear as a necklace. The Western Canadian Inuit use the "minus" subspecies as a tobacco additive or substitute. Related species. "Vaccinium vitis-idaea" differs from the related cranberries in having white flowers with petals partially enclosing the stamens and stigma, rather than pink flowers with petals reflexed backwards, and rounder, less pear-shaped berries. Hybrids between "Vaccinium vitis-idaea" and "Vaccinium myrtillus", named "Vaccinium  × intermedium" Ruthe, are occasionally found in Europe.