I finally got a Euphorbia obesa!! Thank you, Ted's Greenhouse :) Here it is with its new friends Euphorbia suzannae, Haworthia attenuata, and Sedum rubrotinctum.
Also, a voodoo lily (Arum cornatum) and a Dracula lily (Arum dracunis). I consider my visit to the Chicago Flower and Garden Show market a success.
And now, excuse me once more while I return to the Dissertation Dungeon. Sigh.