Medicines
Uva Ursi
Category: Medicines - plant based
Type
Voluntary
Introduction and description
Arctostaphylos uva-ursi is a plant species of the genus Arctostaphylos (manzanita). Its common names include kinnikinnick and pinemat manzanita, and it is one of several related species referred to as bearberry.
It is a fascinating plant because its berries can be classified as a food with healing ability, whilst the leaves of the plant are medicinal. Thus we have created two entries - one for the medicinal leaves - where the medicine is known as Uva Ursi, and one for the food under the heading bearberry. Dr Duke's analysis of the biological activities and chemicals of the plant is linked to both entries so that it is accessible both ways.
Our analysis of the activities however, will be separated into leaf and berries.
Distribution
The distribution of Arctostaphylos uva-ursi is circumpolar, and it is widespread in northern latitudes, but confined to high altitudes further south:
- in Europe, from Iceland and North Cape, Norway south to southern Spain (Sierra Nevada); central Italy (Apennines) and northern Greece (Pindus mountains);
- in Asia from arctic Siberia south to Turkey, the Caucasus and the Himalaya;
- in North America from arctic Alaska, Canada and Greenland south to California, north coast, central High Sierra Nevada (above Convict Lake, Mono County, California), Central Coast, California, San Francisco Bay Area, to New Mexico in the Rocky Mountains; and the Appalachian Mountains in the northeast United States.
In some areas the plant is endangered or has been extirpated from its native range. In other areas, such as the Cascade Range, it is abundant.
Description
Arctostaphylos uva-ursi is a small procumbent woody groundcover shrub 5–30 cm high. The leaves are evergreen, remaining green for 1–3 years before falling. The fruit is a red berry.
The leaves are shiny, small, and feel thick and stiff. They are alternately arranged on the stems. Undersides of leaves are lighter green than on the tops. New stems can be red if the plant is in full sun, but are green in shadier areas. Older stems are brown. In spring, they have white or pink flowers.
Pure stands of Arctostaphylos uva-ursi can be extremely dense, with heights rarely taller than 6 inches. 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. The small solitary three scaled buds are dark brown.
The simple leaves of this broadleaf evergreen are alternately arranged on branches. Each leaf is held by a twisted leaf stalk, vertically. The leathery dark green leaves are an inch long and have rounded tips tapering back to the base. In fall, the leaves begin changing from a dark green to a reddish-green to purple.
Terminal clusters of small urn-shaped flowers bloom from May to June. The perfect flowers are white to pink, and bear round, fleshy or mealy, bright red to pink fruits called drupes. This smooth, glossy skinned fruit will range from 1/4 to 1/2 inch in diameter. The fruit will persist on the plant into early winter. 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.
Uses
Apart from the use of the berry itself for eating, the Bearberry leaf is one of the main ingredients in a number of traditional North American Indian smoking mixes, known collectively as "kinnikinnick" (Algonquin for a mixture).
It has acquired something of a following amongst those who wish to emulate the 'First Nations', however, the smoking mixtures sold as kinnikinnick contain all sorts of things, sometimes relatively harmless sometimes not, as such the conflicting reports appearing on the Internet of the soporific and relaxing effects and in direct opposition the stimulant effects, owe little one suspects to the bearberry leaves.
We have a section on both tobacco and nicotine which might make interesting reading, particularly as many of the older kinnikinnick mixtures appear to have contained nicotania rustica.
Medicinal uses
The leaf of Uva Ursi is a true medicine and it is very powerful medicine. Within the long list of chemicals are some that are cytotoxic, but the list of positive activity is extensive.
It has a number of Vitamins and minerals including Vitamin C, Beta carotene, Calcium, Chromium, Zinc, Thiamin, Sodium, Silicon, Selenium, and Riboflavin.
It contains anti-inflammatory chemicals; it has a number of antibacterial chemicals. Ursolic acid has some major activity being antibacterial, antiEBV, antiHIV, antiLeishmaniasis, antimalarial, Antistaphylococcic, Antitrypanosomic, and generally antiviral.
The plant has tannin which in this case acts as a general chelating agent, as well as providing antibacterial, antiHIV, and antiviral activity. Via quercitrin and quercetin it has antiflu and antiherpes activity and again antibacterial activity against staphylococci.
Much more work is needed to analyse how best to use this medicine. One can already see that the dose is key and only tiny doses are needed – homeopathically small.
Smoking the leaves actually seems something of a waste!
Related observations
Healing observations
- A comparison of the anti-Staphylococcus aureus activity of extracts from commonly used medicinal plants 019014
- Bearberry leaf tea - The Healing power of Herbal teas – Ceres Esplan 019454
- Bruno, Giordano – On Magic - Verbena 016084
- Dr Duke's list of aluminium chelating plants 017803
- Dr Duke's list of Chemicals and their Biological Activities in: Arctostaphylos uva-ursi (L.) SPRENGEL (Ericaceae) -- Bearberry, Uva Ursi 018300
- Dr Duke's list of Plants Containing QUERCETIN 021446
- Dr Duke's list of Plants containing SELENIUM 020550
- Dr Duke's list of plants having chemicals with vasodilatory activity 017836
- Dr Duke's list of plants to help with Crohn's disease 017765
- Dr Duke's list of plants to help with Fibromyalgia 018231
- Dr Duke's list of plants with a number of chemicals with Antitrypanosomic Activity 018271
- Dr Duke's list of Plants with Antiadenovirus Activity 018303
- Dr Duke's list of Plants with Anticalculic activity 018361
- Dr Duke's list of Plants with Anticancer (colon) activity 018455
- Dr Duke's list of Plants with Anticancer (esophagus) activity 018457
- Dr Duke's list of Plants with Anticancer (mouth) activity 018463
- Dr Duke's list of Plants with Anticataract activity 018378
- Dr Duke's list of Plants with Anticfs activity 018365
- Dr Duke's list of Plants with Anticold activity 018430
- Dr Duke's list of Plants with Anticolitic activity 018436
- Dr Duke's list of Plants with Anticrohn's activity 018435
- Dr Duke's list of Plants with Antidote (Cadmium) Activity 018329
- Dr Duke's list of Plants with Antidote (Lead) activity 018377
- Dr Duke's list of Plants with Antidote (Mercury) activity 018376
- Dr Duke's list of Plants with Antiedemic activity 018443
- Dr Duke's list of Plants with Antihemorrhagic activity 018446
- Dr Duke's list of Plants with Antileishmanic Activity 018273
- Dr Duke's list of Plants with AntiLyme activity 018380
- Dr Duke's list of Plants with AntiMRSA activity 018379
- Dr Duke's list of Plants with Antimyocarditic activity 018437
- Dr Duke's list of Plants with AntiPMS Activity 018419
- Dr Duke's list of Plants with Antistreptococcic Activity 018392
- Dr Duke's list of Plants with Antitumor (brain) activity 018451
- Dr Duke's list of Plants with Candidicide activity 018389
- Dr Duke's list of Plants with Candidicide Activity 021073
- Dr Duke's list of plants with hemopoietic effects - 2 All plants with activity 012485
- Dr Duke's list of Plants with HIV-RT-Inhibitor Activity 018288
- Dr Duke's list of Plants with Trypanocide activity 018291
- Dr Duke’s list of Plants with high Antiescherichic activity 021245
- Gonhorroea and herbs 010386