This is a climbing vine that grows well on walls or trellises in Arizona. With the right temperature and adequate water, it produces beautiful yellow blossoms. It gets its name from the three-claw climbing appendage.
The photo above shows a close-up of the 3 claw appendage that makes it such a strong climber.
Here are the lovely, buttery flowers of the Cat's Claw vine.
This photo shows a little more detail of the vine.