This knot was harvested in cassandra public school while the snow was blowing over a workshop on planting a living willow tunnel for the evergreen all hands in the dirt forum. In four months I have woven around 150-200 knots mostly from the material harvested at cassandra.
Since I was 12 or so I have been drawing celtic inspired knotworks mostly drawn from the book of kells and similar, though I would get through a letter sized knot and lose patience after 3-4 hours, because the drawing had a predictable end.
As I have said elsewhere the willow knots are waste material because of the way the were pruned or chewed in years past, and are not prime for fencing or basketry. Each break in the leader shoot produces two or more off-shoots which are the structural basis for each knot, and there are few options for weaving and tying these knots other than in the configuration I have made them. The only limitation to this statement is that I have noticed through time that as I become proficient and evolve different means of attaching willow to itself, different patterns evolve.
This, coupled with the awe-inspiring male or female catkins (or in the case of the dogwood I am working with now rosette style flowers) followed by leaves, brings the impetus to continue making knots far beyond my early drawings.
I am not sure if you have looked at the book of kells, but many of the illuminated knots represent animals, people or other symbols, and in this practice I will continue to create increasingly representational forms.
The first experiments have taken forms of insects, but recently I made a small beaver out of red osier dogwood.
Literally every day I am learning from the progressive revelation of growing stems and leaves, which I think of as knots growing out, like problems solving themselves.
I will post more revelations as they progress, hopefully into massive scale living representatives of animals subsisting on willow and dogwood in the don (like the beavers living in the mud banks of the don-1.5m long!).