Shrubs, 30–100 dm. Stems: 1-year old twigs tan, older grayish; thorns on twigs recurved or straight, dark brown young, 1–2(–2.5) cm. Leaves: petiole 0.7–1.5 cm, glabrous, eglandular, sometimes glandular (Montana); blade ± rhombic-elliptic to elliptic-obovate or broadly ovate, 3–8 cm, lobes 0, or 2 or 3 per side, lobe apex acute to obtuse, margins serrate, ?teeth glandular in Montana?, venation ± semicamptodromous, veins 3 or 4 per side, apex obtuse, abaxial surface ± glabrate, adaxial appressed-pubescent, ?hairy near veins in Oregon?. Inflorescences 7–15-flowered; branches ?punctate?, glabrous, sometimes densely pubescent (coastal Washington); bracteole margins stipitate-or sessile-glandular. Flowers 15–17 mm diam.; hypanthium glabrous; sepals triangular, 4 mm, margins minutely and sparsely glandular-serrate, ?glabrous?; stamens 20, anthers pink; styles 4 or 5. Pomes dull vinous purple becoming black mature, suborbicular to broadly ovoid, 8–10 mm diam., glabrous; sepals reflexed, apex obtuse; pyrenes 4 or 5, sides eroded. 2n = 34, 51, 68.
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