SUPERLATIVE ON MANY FRONTS. “Orchids display extraordinary floral diversity, with striking adaptations to different pollinators among close relatives, partitioning of individual pollinators by precise placement of pollen packets (pollinia) on different parts of their bodies, and extreme convergence and divergence among crossable taxa.”
http://rspb.royalsocietypublishing.org/content/282/1814/20151553