This technique is exactly
as the definition says.
By tying the plant
material into a knot, the knot then becomes a feature
in the design, creating interest either as a fastening
to hold two or more design components together or as
an embellishment in the design, giving accent.
plant material knotted may also become a dominant feature
in a design.
The knot may be tied tightly or loosely; single or
double; it depends on the desired effect.