Harvard’s Glass Flowers, the famed Ware Collection of Blaschka Glass Models of Plants, have returned to display in a refurbished gallery, which shows the iconic collection in new light — literally. The collection, which includes more than 4,000 models, was created by Leopold and Rudolph Blaschka, glass artists from Dresden Germany, over five decades beginning in 1886. Their astonishing accuracy can again be seen after the refurbished gallery reopens in the Harvard Museum of Natural History on May 21.