BEARBERRY

Arctostaphylos Uva-ursi

Heather Family [Ericaceae]

month8may month8jun

flower
flower8white
inner
inner8pink
petals
petalsZ1
type
typeZbell
stem
stem8round

29th July 2007, Cairngorms, Scotland Photo: © Derek Mayes
The leaves are net-veined, but not deeply scored.


29th July 2007, Cairngorms, Scotland Photo: © Derek Mayes
These are probably vestiges of the flowers, preparing to become red berries. The translucent net veins in the leaves are more easily seen by transmitted light.


9th April 2009, Cairngorms, Scotland Photo: © Derek Mayes
Unlike Arctic Bearberry which has round black berries, Bearberry has oblate spheroidal red berries (a bit like conquers). (The black or maroon berries at the top are Crowberry).


9th April 2009, Cairngorms, Scotland Photo: © Derek Mayes
The obverse of the leaves are lighter green and script-marked. The uppermost surface has a satin sheen. The lower stems are woody.


10th July 2009, summit of Green Gable, Cumbria. Photo: © RWD
After flowering.


10th July 2009, summit of Green Gable, Cumbria. Photo: © RWD
Over-wintered berries are bletted, and are now seen to consist of four or five fused segments each containing a seed.


Easily confused with : Cowberry but is a sprawling prostrate undershrub which is never erect unlike Cowberry. The stems can trail up to 5 feet.

Related to : Arctic Bearberry but unlike Arctic Bearberry, where the leaves are deciduous, in Bearberry the leaves are evergreen, are paler beneath and not as deeply vein-grooved. Also, the leaves of Bearberry can be slightly round-toothed.

No relation to : Spiny Bears' Breech(es) nor to Barberry [plants of similar names].

Bearberry was previously placed into the Genus Arbusus but has now been re-assigned to the Genus Arctostaphylos. Arbutin, found in Bearberry and other members of the same genus, (and also in the Strawberry Tree - a member of the Arbusus genus) is a glycosylated hydroquinone. Arbutin prevents the formation of melanin in the skin which is generated in the skin in response to sunlight (a tan). Arbutin readily breaks down into a monosaccharide sugar and hydroquinone which is a compound used as a skin whitening agent. Arbutin is therefore also used as a skin-lightening substance. Perhaps a famous deceased pop-star used it? Arbutin has a high concentration in the skins of pears. Methyl Arbutin is also present.

Ursolic Acid is found in a variety of plants belonging to the Heath and Mint families. It is present in the fruits of Bilberry, Cranberry and Bearberry, and also in other species such as Rosemary, Oregano, Thyme, Peppermint, and in Apple peel. It is a penta-cyclic triterpene acid, used in cosmetics. It has anti-cancer properties when ingested.

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Distribution
 family8Heather family8Ericaceae
BSBI maps
genus8Arctostaphylos
Arctostaphylos

BEARBERRY

Arctostaphylos Uva-ursi

Heather Family [Ericaceae]