That looks like Xerosicyos danguyi or maybe a different species of Xerosicyos. It is also known as the silver dollar plant. It is a climber.

Thanks Poly but yikes, It grows to 12 - 14 feet- now I have to find a place for it! Min

Weird how when you learn something new, it then shows up everywhere. Just read an article on these by palmbob last night. I think it was on davesgarden. Now this is the second time I've seen one today and had not previously known about them.

Thanks for sharing the picture, it's an interesting plant.

They can trail as well as climb, so if you have some hanging pot space, you can try it out that way

this used to be a very rare plant.... but now seen dozens of them at Home Depot... pretty wimpy in cold weather, but great plant for growing up a tree or trellis. Good down to about 25F