This little flower is being outlined with the split stitch:

The split stitch is the featured stitch in my latest installment of the
100 stitches project. In the process pictures that follow, I am using six strands of dmc floss, color 907 and a #24 chenille needle. This is stitched on 100% cotton quilting weight fabric.

Here are the steps. First, come up through your fabric on your stitching line:

Push the needle back down through the fabric at your preferred stitch length:

Pull all the way through to form a simple stitch:

Come up
through the stitch you just formed. Just split it right in the middle with your needle!
Pull the needle and thread all the way through:

Now go back down through the fabric - again, at your preferred stitch length:
Pull all the way through to form the next simple stitch:

And then, again, come up right in the middle of this stitch:

Just keep on stitching in this fashion:

and keep going:

Until you have a line of split stitches!

This is such a simple, easy to learn stitch! It is also a good stitch to use for quick outlines. According to 100 Stitches, the split stitch resembles a fine chain stitch and can even be used as a filling stitch. I think it is funny that this "split" stitch is #50 of 100 stitches!

This stitch is in the linked stitches section of 100 Stitches.