Cassiope tetragona (common names include Arctic bell-heather, white Arctic mountain heather and Arctic white heather) is a plant native to the high Arctic and northern Norway, where it is found widely.Growing to 10–20 cm in height, it is a strongly branched dwarf shrub. The leaves are grooved, evergreen, and scale-like in four rows. Pedicels are long and arched. The plant bears bell-shaped, solitary flowers usually with white and pink lobes and pink anthers.