Vaccinium uliginosum is a Eurasian and North American flowering plant in the genus Vaccinium within the heath family. It is native to cool temperate regions of the Northern Hemisphere, at low altitudes in the Arctic, and at high altitudes to the south.
Vaccinium uliginosum is a small deciduous shrub growing to 10–75 cm (4–30 in) tall, rarely 1 m (3.3 ft) tall, with brown stems (unlike the green stems of the closely related bilberry). The leaves are oval, 4–30 mm (0.16–1.18 in) long and 2–15 mm (0.08–0.59 in) wide, blue-green with pale net-like veins, with a smooth margin and rounded apex. The flowers are pendulous, urn-shaped, pale pink, 4–6 mm (0.16–0.24 in) long, produced in mid spring. The fruit is a dark blue-black berry 5–8 mm (0.20–0.31 in) diameter, with a white flesh, edible and sweet when ripe in late summer. In Korea, bog bilberry is used in infused liquor. In Siberia they use bog bilberries to make jam.