Shrub of dwarf stature, procumbent at high elevation in the wild, rarely more than 1.5m elsewhere. Bark brown, young shoots covered with resinous glands. Leaves ovate to roundish or reniform, 8-20mm long, green and glabrous on both sides, conspicuously round toothed, petiole to 6mm long. North America at high latitudes and high altitudes, also Greenland. Closely allied to and confused with B. nana but distinct in its glandular warted branchlets and longer-stalked leaves. Occupies similarly misty habitats but succeeds in any but the driest conditions in the garden.