I have I. sloteri 'apricot candy', I. alba (night blooming), I. purpurea, and some other hybrids. A friend of mine had them on various trellises but naturally they were tangled so it was hard to tell what seeds were coming from what vine when I was collecting. The only two I can identify right now with any certainty are the I. sloteri (via the lacy and oh so beautiful foliage) and I. abla.
Honestly, there is something about not knowing what kind of surprises I will get come bloom time that really appeals to me. It's like opening a present!