Jim has studied acanthus carving with Hans Sandom, Phil Odden and Else Bigton, and they practice what is called Norwegian Acanthus Carving. There are some unique aspects of Norwegian Acanthus Carving which set it apart from Acanthus carving from other parts of the world.
Norwegian acanthus woodcarving has been written about in several publications, most of which are printed in Norwegian language. This includes Johan Amrud's book, Phil Odden and Else Bigton's work, and more recently, Bob Yorburg and Hans Sandom's book. Mary May of South Carolina, published an extensive review of Acanthus carving through Lost Arts Press in 2017.
Basically, acanthus is a leaf motif or carving feature that goes back to the ancient Greeks as a kind of floral ornamentation. The Norwegian influence is to see the acanthus leaf with the incorporation of continuous and flat surfaces which give unique and different accents to those carved features.