This pattern can be found on pages 36-41of Knitting Green: Conversations and Planet-Friendly Projects, by Ann Budd with contributions from some of the knitwear industry’s leading designers.

The good folks at O-Wool spin knitting yarns from 100 percent
certified-organic fibers and process them in accordance with the
Organic Trade Association’s Fiber Processing Standards. Michele Rose Orne used their DK weight organic merino to knit a hat that includes several elements of nature—trees, waves, stones, and snowflakes. Michele knitted the hat from the brim to the center of the crown in a combination stockinette stitch worked in rounds and intarsia worked back and forth in rows. She worked the bobble “stones” separately and sewed them in place.