In addition to Pteridophyllum racemosum, my favorite nursery coughed up specimens of Diphylleia cymosa and D. grayi on yesterday's visit.
Any comments on their cultivation? I have my usual suspicion of D. grayi as yet another Japanese woodlander that will take exception to our wet winters and bone dry summers, expressing its distaste either by desiccating to nothingness in the summer or rotting away in the winter.
Hopefully D. cymosa will be less fussy - I have a nice clump of Caulophyllum thalictroides, which is generally similar in its habits.