Virginian cowslip and bluebells are the common names of mertensia virginica. The flowers are usually drooping more than the image indicates.
L. H. Bailey Standard Cyclopedia of Horticulture (New York, New York: The MacMillan Company, 1917) volume 4, page 2039
1886×2400, 2.1 MiB
804×1024, 179.1 KiB
502×640, 87.3 KiB
251×320, 27.2 KiB