I have a habit of picking up random fruits from my international travels and trying to germinate their seeds. Problem is, I am not very careful to remember and label whatever seeds I have. The picture below is of some sort of tropical climbing vine, the seeds for which I picked up in Asia I believe. I thought for a long time it was some kind of passion fruit plant, but it does not look like the other passion fruit plants that I have. I have four plants remaining - all 4-5 years old - but I have not seen any flowers.
Any ideas?
Any ideas?