The stitch pattern for this cowl resembles Branching leaves, hence the name. I created it while playing with the "wavy buds" pattern by changing the decreases to those used when knitting brioche in the round. You can watch my skillshare class and learn to knit this cowl (including pattern) for free if you sign up to a free two month trial.
You can buy the pattern here.
For details of my online classes on skillshare: https://www.skillshare.com/user/knitdesign
This includes a detailed class covering all the techniques used in this pattern.