The spiky and ornamental sea buckthorn (Tyrni) is known for its vitamin-rich berries. Sea buckthorn is also the provincial flower of Satakunta, and its name is likely of ancient Scandinavian origin. The Sea Buckthorn sweater was the sixth sweater completed for the book "Wonderful Icelandic Wool." The sweater has a few rows with three strands of yarn, but the floats are not long.