I am still intending to get more tubers/bulbs of these. I had some for quite a few years and loved them. They caused a stir among everyone that saw them and reproduced enough that I could share. I managed to lose mine to a hard and early freeze a few years ago.
If I can add one more thing, the tubers dig themselves deeper in the soil even though they start off 2 inches below the surface. I actually had a couple of plantlets coming out of the drain holes as a result.
Thanks for an interesting article on a charming blooming vine.