This braid is just a one sided dutch braid that wraps around the perimeter of the head a few times.
If you wanted to make it a little cleaner you could section out several concentric circles. I didn't. But next time I probably would. So, with your hair prepared begin your dutch braid in an inconspicuous place. As you are braiding only incorporate small pieces on the outside of the braid only. When you have braided several times around the head and run out of hair to incorporate, continue with a basic braid that you will essentially make a braid rosette after securing the braid with an elastic. Pin the 'rosette' in the center of the spiral braid. If you would like to hide a particularly unattractive section of braid, (say an area where there is a copious amount of flyaways), or you just like the look, add a pretty clip.
Time: 5-7 minutes
Hair length: Medium+