Also known as Cathedral Bells and Cobaea. I think this one is Cobaea Scandens. It is hardy to zones 9-10 (think Florida, Southern California, etc) .. which makes it very much an annual around here. In fact, since we've had some frosts, it is amazing it still looked this good. The plants covered two large brick pillars at the gardens. Either they have incredibly fast growth, or they had a good head start in the greenhouse. Knowing in a week or so there will likely be little left but dead foliage made these photos feel a bit poignant to me.