The 15^th Annual Orchid exhibit presented by the Smithsonian Institution Horticulture Services Division and the U.S. Botanic Garden celebrates the world of orchids, the 200^th birthday of Charles Darwin, and the 150^th anniversary of the publication of On the Origin of Species. Orchids were studied by Charles Darwin (1809–1882) and influenced his formulation of theories of natural selection and evolution.  Since then, they have starred in scientific studies on plant adaptations.  This exhibit explores the alluring world of orchids through the eyes of Darwin and those he influenced—naturalists, horticulturists, and scientists who continue to find new insights and curious surprises while working with these captivating plants.