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Barbara Tisherman Slippper Orchid Collection

The Barbara Tisherman Slipper Orchid Collection at Phipps Conservatory and Botanical Gardens (BTSOC) in Pittsburgh, PA, was established in 2012 as part of the development of the Phipps-Orchid Society Initiative (P-OSI).  P-OSI is a formal partnership between Phipps  and the Orchid Society of Western Pennsylvania, whose mission is to build and maintain a “signature” orchid collection as a whole, as well as to build and maintain the Barbara Tisheman Slipper Orchid Collection.

The mission of the BTSOC is to build a living museum of Slipper Orchids.  The purpose is to have a place (Phipps Conservatory) where orchid enthusiasts and experts, as well as the general public, can see all the Slipper species as well as the important Slipper hybrids, for enjoyment, education and research.


Phipps was designated as the Slipper Orchid Repository by the North American Plant Collections Consortium (now the Plant Collections Network) thru a rigorous application process and onsite visit.


In order to accomplish this, a Paphiopediulum Historic Hybrid Survey was completed and from that came the BTSOC Paph Hybrid Wish List.   (See Complete Historic Paph Survey, Top Picks Paph Survey and BTSOC Paph Wish List.)

Next came the Phragmipedium Historic Hybrid Survey and from that came the BTSOC Phrag Wish List.   (See Complete Results Historic Phrag Survey, Top Picks Phrag Survey and BTSOC Phrag Wish List.)

The Cypripedium Historic Hybrid Survey has just been completed, and there is now a BTSOC Cyp Wish List.  (See Complete Results Historic Cyp Survey, hybrids and species, Top Picks Cyp Survey and BTSOC Cyp Wish List.)

The Wish Lists are updated as Slipper species and hybrids are acquired.  If you would like to make a donation to the Barbara Tisherman Slipper Orchid Collection, please contact Ben Dunigan, Collections Manager at  


For more information, contact:

Nancy Kline

Demetria Marsh                                          

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