HAREBELL, known also as the blue-bell of Scotland, and witches' thimbles, a well-known perennial wild flower, Campanula rotundi f olia, a member of the bell-flower family (Campanula ceae) . The harebell has a very slender slightly creeping root stock, and a wiry, erect stem. The leaves at the base of the stem, to which the specific name rotundi folia refers, have long stalks, and are roundish or heart-shaped with a wavy or toothed margin; the lower stem leaves are ovate or lance-shaped, and the upper ones linear, almost stalkless, acute and entire. The flowers are slightly drooping, arranged in a panicle, or in small specimens single, hav ing a smooth calyx, with narrow pointed erect segments, the co rolla bell-shaped, with slightly re curved segments, and the capsule nodding, and opening by pores at the base. The plant is found on heaths and pastures throughout Great Britain and flowers in late summer and in autumn; it is widely spread in the north tem perate zone. In North America it occurs in meadows and on moist rocks from Labrador to Alaska and southward to Penn sylvania, Illinois and Nebraska and in the Rocky Mountains to Arizona and in the Cascades and the Sierra Nevada to northern California. (See CAMPANULA.)