Modified version of stitch pattern used in Starflower Hat by Connie Chang Chinchio in Textured Stitches.
Errata for the original pattern instruct the knitter to move the beginning-of-rounds marker at the start of rounds 7 and 15. As shown in the stitch map below, this isn’t necessary, provided your initial placement of the beginning-of-rounds marker is at a “natural break” in the patterning. See also this blog post.
Shown with a cast-on count of 24 stitches.