Arctostaphylos uva-ursi subsp. uva-ursi

Uva-ursi uva-ursi (I,.) Britton; Britt. & Brown, 111. Fl. ed. 2
2: 693. 1913.
Arbutus Uva-ursi L. Sp. PI. 395. 1753, Uva-ursi procumbens Moench, Meth. 470. 1794. Mairania Uva-ursi Desv. Jour. Bot. Desv. II. 1: 37. 1813. Uva-ursi buxifolia S. F. Gray, Nat. Arr. Brit. PI. 2: 400, 1821. Arctostaphylos Uva-ursi Spreng. Syst. 2: 287. 1825. Arctostaphylos officinalis Wimm. & Grab. Fl. Siles. 1: 391. 1827. Arctostaphylos procumbens Patze, Meyer & Elkan, Fl. Preuss. 188. 1850. Daphnidostaphylis Fendleriana Klotzsch, Linnaea 24: 80. 1851. Arctostaphylos Uva-ursi alba Cockerell, W. Am. Sci. 6: 11. 1889.
A low prostrate shrub, with rooting branches 2-5 dm. long, tardily exfoliating, reddishbrown bark, and glabrous or sparsely tomentose branchlets; leaf -blades spatulate to obovate, 15-20 mm. long, rounded or emarginate at apex, not at all mucronate, tapering at the base, thin-coriaceous, bright-green and glabrous above, paler beneath, the margins thin and more or less revolute; petioles 2-3 mm. long; flowers in short, few-flowered racemes; rachis sparsely tomentose; bracts triangular, acute, 2 mm. long, persistent, nearly or quite glabrous; pedicels slender, 3-4 mm. long, glabrous; calyx-lobes broadly ovate, glabrous or rarely sparsely pubescent on the margins; corolla 4r-6 mm. long, white or tinged with pink; ovary glabrous; fruit globose, bright-red, with a bitter astringent pulp; nutlets separable, rounded on the back and 1 -nerved.
Type locality: Northern Europe.
Distribution: Arctic America, from Labrador to Alaska, and southward to Virginia, Illinois, New Mexico, and the northern boundary of California; also in Europe and Asia.