This week's stitch for the TAST Challenge hosted by Sharon Boggon at Pin Tangleis called Chained Cross Stitch and, is exactly that. A cross stitch of which one half of the cross is made using a chain stitch.
It is a really pretty stitch and results in quite a nice, thick braid. Sharon's tutorial for how to work the stitch can be found here.
I added another circle to my sampler using variegated silk thread.