Kodachrome by P.L. Ricker.
May, 1953.Pink Lady’s-slipper, Loveliest Northern Orchid, Forces Bees to Assist Its Reproduction
Once inside the blossom of Cypripedium acaule, a bee can escape only by brushing against plant hairs, which pick up the pollen carried from other flowers. This Pink Lady’s-slipper grew at Langley, Virginia.