- Illustration from Köhler's Medicinal Plants (1887)
- Flowers
- Flowers
- A. uva-ursi subsp. uva-ursi fruit
Arctostaphylos uva-ursi | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Ericales |
Family: | Ericaceae |
Genus: | Arctostaphylos |
Species: | A. uva-ursi |
Binomial name | |
Arctostaphylos uva-ursi | |
Synonyms [2] | |
List
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Arctostaphylos uva-ursi is a plant species of the genus Arctostaphylos widely distributed across circumboreal regions of the subarctic Northern Hemisphere. [3] Kinnikinnick (from the Unami for "smoking mixture") is a common name in Canada and the United States. [3] [4] [5] Growing up to 30 centimetres (12 inches) in height, the leaves are evergreen. The flowers are white to pink and the fruit is a red berry.
One of several related species referred to as bearberry , [3] [6] its specific epithet uva-ursi means "grape of the bear" in Latin (), similar to the meaning of the generic epithet Arctostaphylos (Greek for "bear grapes").
Arctostaphylos uva-ursi is a small procumbent woody groundcover shrub growing to 5–30 centimetres (2–12 inches) high. [7] Wild stands of the species can be dense, with heights rarely taller than 15 cm (6 in). Erect branching twigs emerge from long flexible prostrate stems, which are produced by single roots. The trailing stems will layer, sending out small roots periodically. The finely textured velvety branches are initially white to pale green, becoming smooth and red-brown with maturity. [3] The small solitary three-scaled buds are dark brown.
The leaves are shiny, small, and feel thick and stiff, [7] measuring about 4 cm (1+1⁄2 in) long and 1 cm (1⁄2 in) wide. [8] Their tops are darker green than their undersides. [9] They have rounded tips tapering back to the base, held vertically by a twisted leaf stalk in an alternate arrangement on the stem. [9] The leaves remain green for 1–3 years before falling in autumn, when their colour changes to a reddish-green or purple, pale on the underside. [7]
Terminal clusters of small urn-shaped flowers bloom from May to June. The flowers are white to pink, [9] and bear round, fleshy or mealy, bright red to pink fruits called drupes. [3] The smooth, glossy skinned fruits range from 1⁄4 to 1⁄2 inch (6 to 13 mm) in diameter. The red fruits [3] persist on the plant into early winter. The fruits are bittersweet when raw, but sweeter when boiled and dried. Each drupe contains 1 to 5 hard seeds, which need to be scarified and stratified prior to germination to reduce the seed coat and break embryo dormancy. There is an average of 40,900 cleaned seeds per pound. [5]
The plant contains diverse phytochemicals, including ursolic acid, tannic acid, gallic acid, some essential oils and resin, hydroquinones (mainly arbutin, up to 17%), tannins (up to 15%), phenolic glycosides and flavonoids. [10]
As many as 14 subspecies have been accepted, [11] however as of 2024 they are considered synonyms by major sources such as Plants of the World Online and World Flora Online. [2] [12]
The genus name of Arctostaphylos uva-ursi comes from the Greek words arctos (meaning bear) and staphyle (meaning "bunch of grapes") in reference to the fruits which form grape-like clusters. [3] [4] [7] In the wild, the fruits are commonly eaten by bears. [7] The specific epithet, uva-ursi, comes from the Latin words uva (meaning grape) and ursus (bear), reflected by the bearberry nickname. [7] [13]
The common name, kinnikinnick, is an Algonquin word meaning "smoking mixture". [4] [7] Native Americans and early pioneers smoked the dried uva-ursi leaves and bark alone or mixed with other herbs, tobacco or dried dogwood bark in pipes. [7] Numerous common names exist, depending on region, such as mealberry, sandberry, mountain-box, fox-plum, hog-crawberry, and barren myrtle. [4]
The distribution of Arctostaphylos uva-ursi is circumpolar, and it is widespread in northern latitudes, [3] [11] [5] but confined to high altitudes further south:
It is a fire-tolerant species and may be a seedbanking species. [3]
Arctostaphylos uva-ursi is an alternate host for spruce broom rust. [14]
Bears and other animals eat the berries. [15]
The plant is rare or endangered in several states of the Midwestern United States. [5]
One review indicated that ingestion of large doses can cause allergic reactions, with nausea and seizures, as a potential emergency condition. [16] Preliminary studies indicate that arbutin may be toxic when ingested in high doses. [17] Uva ursi may cause adverse effects in people with liver or kidney disease, or pregnant and breastfeeding women. [16]
The leaves contain arbutin, [16] [17] which metabolizes to form hydroquinone, a potential liver toxin. [17] [18]
Bearberry fruits and leaves are used by members of the Blackfeet Nation as food. [19] While edible raw, the fruits are fairly bland that way, [7] [8] [20] but can be used to make jelly. [14] The berries were used as seasoning and cooked with meat. [21] The young leaves can be made into tea. [8] Teas and extracts of the leaves have been used in traditional medicine of First Nations people over centuries as urinary tract antiseptics, diuretics, and laxatives. [16] In herbalism, leaf tea is used to treat urinary tract inflammation. [16] Though thought to be an astringent [22] or cure for sexually transmitted diseases, [23] [ citation needed ] as of 2017, there was no high-quality evidence from clinical research that such treatments are effective or safe. [16]
Dried bearberry leaves are the main component in many traditional North American Native smoking mixes, [4] [24] known collectively as "kinnikinnick" (Algonquin for "smoking mixture") used especially among western First Nations, often including other herbs and sometimes tobacco. [4] [7] [16]
Indigenous peoples also used the plant to make yellow dye. [14]
There are several cultivars that are propagated for use as ornamental plants. [4] It is an attractive year-round evergreen groundcover for gardens, and is useful for controlling erosion on hillsides and slopes due to its deep roots. [7] It is tolerant of sun and dry soils, and is thus common groundcover in urban areas, in naturalized areas, and in native plant or rock gardens. [3] [7] As the seeds are difficult to germinate they are most often propagated using rooted stems. [25]
Manzanita is a common name for many species of the genus Arctostaphylos. They are evergreen shrubs or small trees present in the chaparral biome of western North America, where they occur from Southern British Columbia and Washington to Oregon, California, Utah, Arizona, New Mexico, and Texas in the United States, and throughout Mexico. Manzanitas can live in places with poor soil and little water. They are characterized by smooth orange or red bark and stiff, twisting branches. There are 105 species and subspecies of manzanita, 95 of which are found in the Mediterranean climate and colder mountainous regions of California, ranging from ground-hugging coastal and mountain species to small trees up to 20 feet (6m) tall. Manzanitas bloom from winter to early spring and carry berries in spring and summer. The berries and flowers of most species are edible.
Bearberries are three species of dwarf shrubs in the genus Arctostaphylos. Unlike the other species of Arctostaphylos, they are adapted to Arctic and subarctic climates, and have a circumpolar distribution in northern North America, Asia and Europe.
Arctostaphylos is a genus of plants comprising the manzanitas and bearberries. There are about 60 species of Arctostaphylos, ranging from ground-hugging arctic, coastal, and mountain shrub to small trees up to 6 m tall. Most are evergreen, with small oval leaves 1–7 cm long, arranged spirally on the stems. The flowers are bell-shaped, white or pale pink, and borne in small clusters of 2–20 together; flowering is in the spring. The fruit are small berries, ripening in the summer or autumn. The berries of some species are edible.
Arbutus is a genus of 12 accepted species of flowering plants in the family Ericaceae, native to temperate regions of the Mediterranean, western Europe, the Canary Islands and North America, and commonly called madrones or strawberry trees. The name Arbutus was taken by taxonomists from Latin, where it referred to the species now designated Arbutus unedo.
The curry tree or Bergera koenigii, is a tropical and sub-tropical tree in the family Rutaceae, native to Asia. The plant is also sometimes called sweet neem, though M. koenigii is in a different family from neem, Azadirachta indica, which is in the related family Meliaceae.
Rubus parviflorus, commonly called thimbleberry, is a species of Rubus native to northern temperate regions of North America. The plant has large hairy leaves and no thorns. It bears edible red fruit similar in appearance to a raspberry, but shorter, almost hemispherical. It has not been commercially developed for the retail berry market, but is cultivated for landscapes.
Anal bleaching is the process of lightening the color of the skin around the anus. It is done for cosmetic purposes, to make the color of the anus more uniform with the surrounding area. Some treatments are applied in an office or salon by a cosmetic technician and others are sold as cream that can be applied at home.
Arctous alpina, the alpine bearberry, mountain bearberry or black bearberry, is a dwarf shrub in the heather family Ericaceae. The basionym of this species is Arbutus alpinaL..
Cornus sericea, the red osier or red-osier dogwood, is a species of flowering plant in the family Cornaceae, native to much of North America. It has sometimes been considered a synonym of the Asian species Cornus alba. Other names include red brush, red willow, redstem dogwood, redtwig dogwood, red-rood, American dogwood, creek dogwood, and western dogwood.
Berberis nervosa, commonly known as dwarf Oregon-grape, Cascade barberry, Cascade Oregon-grape, or dull Oregon-grape, is a flowering plant native to the northwest coast of North America from southern British Columbia south to central California, with an isolated population inland in northern Idaho. It is especially common in second growth, Douglas-fir or western redcedar forests, making use of those pools of sunlight that intermittently reach the ground.
In botany, a berry is a fleshy fruit without a stone (pit) produced from a single flower containing one ovary. Berries so defined include grapes, currants, and tomatoes, as well as cucumbers, eggplants (aubergines), persimmons and bananas, but exclude certain fruits that meet the culinary definition of berries, such as strawberries and raspberries. The berry is the most common type of fleshy fruit in which the entire outer layer of the ovary wall ripens into a potentially edible "pericarp". Berries may be formed from one or more carpels from the same flower. The seeds are usually embedded in the fleshy interior of the ovary, but there are some non-fleshy exceptions, such as Capsicum species, with air rather than pulp around their seeds.
beta-Arbutin, also known as β-arbutin or by its International Nomenclature of Cosmetic Ingredients (INCI) name, arbutin, is a glycosylated derivative of hydroquinone. β-Arbutin is naturally present in the leaves and bark of a variety of plants, notably the bearberry plant, Arctostaphylos uva-ursi. Utilized as a biosynthetic active ingredient in topical treatments for skin lightening, β-arbutin is aimed at addressing hyperpigmentation issues. Its mechanism of action involves inhibiting the activity of tyrosinase, an essential enzyme for melanin synthesis in the human skin, thereby leading to a reduction in hyperpigmentation. It is important to distinguish β-arbutin from its structurally similar stereoisomer, α-arbutin, which exhibits similar effects in clinical applications.
Vaccinium parvifolium, the red huckleberry, is a species of Vaccinium native to western North America.
One of many species of manzanita, Arctostaphylos manzanita has the common names common manzanita and whiteleaf manzanita.
Arctostaphylos glauca is a species of manzanita known by the common name bigberry manzanita. It is native to California and Baja California, where it grows in the chaparral and woodland of coastal and inland hills.
Xylococcus is a monotypic genus of flowering plants in the heather family which contains the single species Xylococcus bicolor, commonly known as the mission manzanita. It is a burl-forming, evergreen shrub with leathery leaves and smooth dark reddish bark. From December to February, white to pink urn-shaped flowers adorn the foliage, often attracting hummingbird pollinators. It is native to southern California and the Baja California Peninsula, south to the Sierra de la Giganta. There is growing concern over the future of this plant, referred to as the "queen of the elfin forest, " as it may possibly lose up to 88% of its habitat and its wild seedlings are failing to survive more than a full year.
Sambucus cerulea or Sambucus nigra ssp. cerulea, with the common names blue elderberry and blue elder, is a coarse textured shrub species of elder in the family Adoxaceae.
Kinnikinnick is a Native American and First Nations herbal smoking mixture, made from a traditional combination of leaves or barks. Recipes for the mixture vary, as do the uses, from social, to spiritual to medicinal.
Spruce broom rust or yellow witches' broom rust is a fungal plant disease caused by the basidiomycete fungus known as Chrysomyxa arctostaphyli. It occurs exclusively in North America, with the most concentrated outbreaks occurring in northern Arizona and southern Colorado on blue and Engelmann spruce, as well as in Alaska on black and white spruce. This disease alternates its life cycle between two hosts, with the spruce serving as the primary host and bearberry serving as the secondary or alternate host. The name for the disease comes from the distinctive “witches broom”, commonly yellow in color, which forms on the spruce after young needles have been infected. Management must be carried out through physical or mechanical methods, such as the pruning of brooms or the removal of the secondary host from the area, because no chemical control measures have yet been determined to be economically effective. Generally, spruce broom rust is seen as a mostly cosmetic issue, and it is very rarely the direct cause of tree death; however, research has shown a reduction in overall productivity and health of infected trees, making it an important issue for logging and timber companies.
Ehretia tinifolia is a woody, perennial tree, usually 0.5 to 3 m in height, branched from the base, from reddish-brown to red-purple bark, exfoliating ; The leaves are coriaceous, elliptic, from 1 to 3.3 cm long. The flower is urceolate, white to Mexican pink and grouped in clusters of five to eight flowers. The plant can reproduce vegetatively from branches that are buried, but this type of reproduction is rare.
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: CS1 maint: others (link)The name Arctostaphylos is from Greek: arctos = bear, staphylos = bunch of grapes or berries; hence bearberry, pertaining redundantly to A. uva-ursi (Latin: uva = berry, ursi = of the bear).