Presentation materials from David Zaitlin's lecture at the Convention.
David Zaitlin also exhibited a plant of Sinningia 'John Fyfe', named after the grower of the first known example of upward-facing peloric flowers. You can see a print of John Fyfe's plant above, in the center top row.
The hybrid Sinningia 'John Fyfe' contains non-speciosa blood in its ancestry, as explained in the educational card:
David Zaitlin also exhibited an example of a "natural" (non-peloric) form of Sinningia speciosa, with more slipper-shaped flowers. This one is referred to as Sinningia speciosa 'Serra da Vista':
For more reading, the article in the Gesneriads journal is highly recommended.