A slender, graceful, wiry-stemmed herb, perennial by slender root-stocks, usually smooth, sometimes pubescent. Stems erect or decumbent, often several from the same root, 6 inches to 3 feet high. Basal leaves nearly orbicular, usually heart-shaped at the base, one-fourth to 1 inch wide, toothed or entire, on long, slender, weak petioles, visually withering or dying before the flowers open, but new ones developing in late summer. Stem leaves slender, linear or linear-lanceolate, 1 to 3 inches long. Flowers usually racemose, rarely solitary, at the apex of the stem, drooping on slender, hairlike stalks. Calyx with five threadlike spreading lobes. Corolla bright blue or violet-blue, bell-shaped, one-half to nearly 1 inch broad, the margin with five pointed lobes. Fruit an ovoid capsule, ribbed and opening by short clefts near the base.
In fissures and cracks of rocks near waterfalls and in rocky woods, sometimes in meadows and sandy fields. Exhibiting in its varying habitats marked differences in growth and appearance. Labrador to Alaska, south to New Jersey, Pennsylvania, Illinois, Nebraska and in the Rocky mountains to Arizona, in the Sierra Nevada to California and also in Europe and Asia. Flowering from June to September.
Memoir 15 N. Y. State Museum
Harebell; Bluebells Of Scotland - Campanula rotundifolia