See the small looms index page for many other tutorials and projects using flower looms and other small hand held looms.
 

Back stitch can be used to fasten the centre of your flower, or as a decorative feature stitched all the way to the edges.

(If you want to stitch the centre of your flower using a different colour stitch the centre with a new length of yarn and leave a tail to darn in later)

1: To stitch the centre of your flower using the same yarn as your petals, pass your needle under the threads of the petal on the opposite side of your flower to the last petal you wound.

For example, the last petal I wound is at the bottom of the photo on the left.

6: Repeat step 5, passing your needle under the last petal, plus the next petal on the left each time.

Continue doing this all the way around as many times as you like. If you're only going to work one round make sure to stitch the first petal twice.