Three stalks of locally collected barley, tied together with rafia are used to represent the cutting down of John Barleycorn at Mabon. Description from celticjewelry.com. I searched for this on bing.com/images
It was believed that the corn spirit lived amongst the crop, and the harvest made it effectively homeless. Therefore, hollow shapes were fashioned from the last sheaf of wheat or other cereal crop. The corn spirit would then spend the winter in their homes until the "corn dolly" was ploughed into the first furrow of the new season.