Dvorovoi,

I think that you probably have Cissus tuberosa, a relative of grapes and Virginia Creeper. It is a native of Mexico.

Mike

Here is a link that might be useful: Cissus tuberosa

Mike

That makes sense on a number of levels: I do know it's a Mexican native, and the leaves are suspiciously Cissus-like. I'm thinking of the rhombifolias in particular here.

Excellent! Thanks for your sharp diagnostic eye.

Just lucky is all... I used to work at a nursery the grew/sold caudiciforms ;)

Mike