The fish bone stitch consists of a number of slanted diagonal stitches made inside two imaginary parallel lines.It is great filling stitch, especially for leaves as it leaves a center spine ( it is called the midrib, I suppose) just like what we have on the leaf
You can work it close together or spaced, depending on where you place the needle after the first stitch is made.If you place the needle close to the previous stitch the work will turn out to be closed together , like a diagonally done satin stitch.
How to do the fish bone stitch
Draw the parallel lines. You can also imagine the lines and work.
Start from the left side (1) – Make a slanting stitch upwards towards the rightside of the center of the two lines
Take up the thread a little to the left at (3). Make slanting stitch to the right straight across point 1
Continue making the slanting diagonal stitches upwards.