Five minutes ago I had no idea what a stumpery was.
But now I must have one.
A stumpery is an intentional arrangement of woody material like trunks and root wads. A root wad is a length of downed tree that includes a portion of the trunk and, most importantly, the root mass or ball. The goal of a stumpery is the creation of habitat especially for ferns; secondarily comes the sense of accomplishment from arrangements that display the arresting architecture of the roots, or any other things that you can find on or in re-purposed wood.
And don't get me started on Stump Fences.