Knotted stitch

A knotted stitch is any embroidery technique in which the yarn or thread is knotted around itself. Common knotted stitches include French knots and coral stitch. Knotted stitches can be subdivided into individual or detached knots, continuous knotted stitches, and knotted edgings.
Applications.
Individual knots are often found used as detached filling stitches. 
Knotted edgings are used as a decorative trims, and can also be used to fill open spaces in cutwork and in needlelace. 
Detached knots.
Individual knots include:
Continuous stitches.
Knotted stitches include:
Knotted edgings.
Knotted edgings include: