here are two examples of a species related to cornu-cervi in the Polychilos section
I guess that this problem has nothing to do with the species. I never had problems to get pods on my lamelligeras. Actual I have this problem with doweryensis. But I think it is a kind of culture problem.What can you tell me about Phal. lemelligera? I grew out a flask of them from Taiwan many years ago, only have 2-3 plants left. They are difficult to set seed on: you have to remove the pollen from 1 flower, dry it in the greenhouse 1-2 days, and then put the pollen into another flower. Even then your chances of getting a pod are less than 50:50.