Here's another name for these, from Danish 'Jordskokker', the equivalent of which in English would be 'Earthchokes'. We've got a fair amount in the garden, as well as in our earlier garden, for years. But - I have never ever seen them flowering. The type we have is white and knobby and I am in Denmark (whatever US zone that would be). Is it the type of choke we have or the climate that prevents them from flowering? I would love flowers on them, they are very pretty!