It's a chalice vine, not sure which one though.
Might be Solandra grandiflora var.
......cheryl

I think it may be a variegated Solandra maxima. I have seen it growing in Sydney.

I looked on the Gardino's website and there is a photo almost identical to my plant as Solandra maxima variegated, so that's what it is! Thanks so much, I knew it was Solandra but her saying "shrub" threw me.

yeah, it's a true vine, but it's so big... I saw it in a nursery once, it looked like a small tree. the flowers are ENORMOUS.

Although it does grow best as a vine, it can be trained as a shrub. The results for me were good, although if I had a good space to grow it as a vine, I would.

Bill