The Glass Flowers, formally The Ware Collection of Blaschka Glass Models of Plants, is a famous collection of highly realistic glass botanical models at the Harvard Museum of Natural History (HMNH) at Harvard University in Cambridge, Massachusetts, one of the Harvard Museums of Science & Culture.
They were made by Leopold and Rudolf Blaschka from 1887 through 1936 at their studio in Hosterwitz, Germany, near Dresden. The collection was commissioned by Professor George Lincoln Goodale, the first director of Harvard's Botanical Museum, to aid in teaching botany and was financed by Mary Lee Ware and her mother, Elizabeth C. Ware. There are 847 life-size models representing 780 species and varieties of plants in 164 families as well as over 3,000 models of details such as enlargements of plant parts and anatomical sections. The collection comprises approximately 4,400 individual glass models.
In 1886 the Blaschkas were approached by Professor Goodale, who had come to Dresden for the sole purpose of finding them, with a request to make a series of glass botanical models for Harvard. Leopold was initially unwilling as his current business of selling glass marine invertebrates was hugely successful but, eventually, the famed glass artists agreed to send test-models to the U.S. and, although damaged in customs, the fragments convinced Goodale that Blaschka glass art was a more than worthy educational investment. His reasons for wanting the models was simple: At that time, Harvard was the global center of botanical study. As such, Goodale wanted the best, but the only used method was showcasing pressed and carefully labeled specimens — a methodology that offered a twofold problem: being pressed, the specimens were two-dimensional and tended to lose their color. Hence they were hardly the ideal teaching tools. However, Harvard had recently procured several of the Blaschkas' marine invertebrates and, upon seeing them, Professor Goodale realized that glass flowers would solve his problem as, being glass, the were both three-dimensional and would retain their color.
But investments require fund, and to cover such an expensive enterprise Goodale approached his former student Mary Lee Ware and her mother, Elizabeth C. Ware, with his idea. Being independently wealthy and (already) liberal benefactors of Harvard's botanical department, Mary convinced her mother to agree to underwrite the consignment of the uncannily lifelike models they both were enchanted by. The contract signed dictated that the Blaschkas need only work half-time on the models (beginning in 1887) but, in 1890, they and Goodale — signing on behalf of the Wares — signed an updated version that allowed Leopold and Rudolf to work on them full-time; some sources detail the agreement as a shift from a 3-year contract to a 10-year one, agreed to once Goodale convinced Mary and her mother of the wisdom in doing so. Either way, the Wares liberally funded the entire enterprise, which lasted until 1936; after both Leopold and Elizabeth had died. To this day the now world famous Glass Flowers are still on display at the HMNH — the exhibit itself dedicated to Dr. Charles Eliot Ware (the deceased father and husband of Mary and Elizabeth Ware respectively. Moreover, unlike the glass marine invertebrates — which were "a profitable global mail-order business" —, the Glass Flowers were commissioned solely for and are unique to Harvard.
The models are made out of glass but other materials were used in their construction including wire for internal support, a variety of organic media, and paint. In an article for the Journal of American Conservation, authors McNally and Buschini note that "the Glass Flowers are not made simply of glass. Many are painted (particularly models made in the years 1886–95) and varnished; some parts are glued together, and some of the models contain wire armatures within the glass stems. Coloring of the models ranges from paint to colored glass to enameling." To this day, no one has been able to duplicate the Blaschkas' fine artistry.
Rumors of a secret glassworking process employed by the Blaschkas have been around as long as the models have. The Blaschkas actually practiced techniques that were common to glassworkers of the time but what set them apart was their own astonishing skill in glassworking, meticulous dedication to the study and observation of nature, and enthusiasm for the subject matter. Leopold once did comment on the false rumor of secret methods during one of his correspondences with Mary Lee Ware: "Many people think that we have some secret apparatus by which we can squeeze glass suddenly into these forms, but it is not so. We have tact. My son Rudolf has more than I have, because he is my son, and tact increases in every generation." After Leopold's (and her mother's) death, Miss Ware visited Rudolf and wrote the following of him to Professor Oakes Ames, Goodale's successor, appearing to confirm the previous statement of Leopold's regarding his son: "One change in the character of his work and, consequently in the time necessary to accomplish results since I was last here, is very noteworthy. At that time...he bought most of his glass and was just beginning to make some, and his finish was in paint. Now he himself makes a large part of the glass and all the enamels, which he powders to use as paint."
The Blaschkas practiced lampworking, a glassworking technique in which glass is melted over a flame fed by air from a foot-powered bellows. The melted glass is then shaped using tools to pinch, pull or cut and forms can be blown as well. As oil lamps were replaced by modern gas-fueled torches, lampworking has come to be referred to as flameworking or torchworking. Specifically, they both worked at an old style Bohemian lamp-working table - which is still on display at the Glass Flower exhibit (donated to Harvard by a Blaschka relative).
Botanist Donald Schnell gives testimony to the astonishing accuracy of the models. He writes of a plant, Pinguicula, the details of whose pollination were unknown. By painstaking analysis of its structures, he worked out the probable mechanism of pollination. On visiting the glass flowers exhibit for the first time in 1997, he was enjoying the "enchanting and very accurate" models, when he was astonished to see a panel showing Pinguicula and a pollinating bee: "one sculpture showed a bee entering the flower and a second showed the bee exiting, lifting the stigma apron as it did so," precisely as Schnell had hypothesized. "As far as I know Professor Goodale never published this information, nor did it seem to have been published by anyone back then, but the process was faithfully executed."
In the Journal of American Conservation, authors Whitehouse and Small state that "the superiority in design and construction of the Blaschka models surpasses all modern model making to date and the skill and art of the Blaschkas rests in peace for eternity."
The Glass Flowers are one of the most famous attractions of the Boston area. More than 210,000 visitors view the collection annually. In 1936, when Harvard invited the public to tour the campus in honor of its tercentenary, a New York Times reporter taking the tour commented "Tercentenary or no, the chief focus of interest remains the famous glass flowers, the first of which was put on exhibition in 1893, and which with additions at intervals since, have never failed to draw exclamations of wonder or disbelief from visitors."
A visitor returning to Back Bay in 1951 after a ten-year absence wrote "I was told the two sights above all others that visiting salesmen from the country wish to see when in Boston are the glass flowers at the Harvard Museum of Natural History in Harvard Square and the Mapparium at the Christian Science Church building."
Marianne Moore wrote in a poem, "Silence,"
My father used to say,
"Superior people never make long visits,
have to be shown Longfellow's grave,
or the glass flowers at Harvard."
Prior to making the Glass Flowers, the Blaschkas established a very successful business supplying collections around the world with glass models of marine invertebrates. Cornell University has some on display  but most of their models are stored at the Corning Museum of Glass in Corning, New York . Other locations exhibiting the Blaschka invertebrates include:
- Boston Museum of Science (US)
- Harvard Museum of Natural History (US)
- Natural History Museum, London (UK)
- National Museum of Ireland (Ireland)
- Redpath Museum of McGill University, Montreal (Canada)
- Natural History Museum of Geneva (Switzerland)
- Hancock Museum, Newcastle upon Tyne (UK)
- Aquarium-Museum of Liège (Belgium)
- http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/goodale-george.pdf National Academy of Sciences Biographical Memoir
- Flowers that never fade / Franklin Baldwin Wiley. Boston Bradlee Whidden, Publisher 1897
- Schultes, Richard Evans., William A. Davis, and Hillel Burger. The Glass Flowers at Harvard. New York: Dutton, 1982. Print.
- The Archives of Rudolph and Leopold Blaschka and the Ware Collection of Blaschka Glass Models of Plants - http://botlib.huh.harvard.edu/libraries/glass.htm
- NcNally, Rika Smith and Nancy Buschini (1993). Journal of the American Institute for Conservation, Volume 32, Number 3, Article 2 (pp. 231 to 240)
- Daston, Lorraine. Things That Talk: Object Lessons from Art and Science. New York: Zone, 2004. Print.
- "Glass Dictionary". Corning Museum of Glass. Retrieved 6 August 2013.
- Schnell, Donald (2002). Carnivorous Plants of the United States and Canada. Timber Press. ISBN 0-88192-540-3.
- "Back to Back Bay After an Absence of Ten Years". The New York Times. June 10, 1951. p. XX17.
- The Ware Collection of Blaschka Glass Models of Plants Harvard website
- Invertebrate Models at Cornell University
- "Glass Flowers bloom again at HMNH", Harvard University Gazette
- "'Glass Flowers' gallery to close for renovations", Harvard University Gazette
- "Care for Glass Flowers branches out: Natural History Museum's fragile flowers get needed cleaning and repair", Harvard University Gazette
- "These creatures see dusty duty: Obscure cousins of the Glass Flowers depict denizens of the deep", Harvard University Gazette
- "Eclipsed for decades, Harvard's glass animals step out", Harvard University Gazette
- "The Glass Flowers". Corning Museum of Glass. Corning Museum of Glass. 18 October 2011. Retrieved 5 June 2014.
- The Blaschka Archives, held by the Rakow Library of the Corning Museum of Glass. Retrieved 5 June 2014.