The yellow may seem somewhat saturated mainly because it was after a rain (but before the snow, see attached photo) and I used a polarizer.
In postprocessing I played with the curves, and touched only the vibrance (I went back and forth, the effect on the yellow is minimal).
I really like those branches, not sure why. Even more when I leave the photo somewhat soft and with less contrast (nr 2), I plan to print it big and see if the effect remains.
PS, the first one was made in Saguaro NP