The leaves that were on the branches all dried up so I stripped all the remaining leaves off the willow branches. This actually works well for two reasons:
1)The stem cutting can concentrate better on growing roots without trying to save the leaves.
2)New leaves sprouting are good indicators of rooting.
In the picture on the left you can see the newly formed roots pushing out away from the stem. The first two pictures show the newly formed leaves that grew once the new roots had formed.