Bearberry

any of several prostrate shrubs belonging to the genus Arctostaphylos, of the heath family, especially A. uva-ursi, having tonic, astringent leaves and bright-red berries.
cascara.
possum haw (def 1).
any of several other plants, as some species of cranberry.
Historical Examples

The Greek generic name, translated into English, becomes “bearberry.”
The Wild Flowers of California: Their Names, Haunts, and Habits Mary Elizabeth Parsons

There they dined on blueberries, and slept on thick beds of moss and low growing blueberry and bearberry plants.
The Island of Yellow Sands E. C. [Ethel Claire] Brill

Uva Ursi (bearberry Leaves), leaves of red whortleberry, and others.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

Arctostaphylos (bearberry) and Andromeda are arctic and alpine genera occurring in Britain.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 Various

I certainly obtained better results with buchu and bearberry (Arctostaphylos).
Parasites T. Spencer Cobbold

noun (pl) -ries
a trailing evergreen ericaceous shrub, Arctostaphylos uva-ursi, with small pinkish-white flowers, red berries, and astringent leaves
alpine bearberry, black bearberry, a related species, A. alpina of European mountains, having black berries