Surprised!!! Well ,this is nothing but the blanket stitch. But look at the shape. It looks like a honeycomb - hence the name. The first row is stitched the usual way. But in the second row,the stitch that goes down under the cloth is kept slightly above the first level so that it pulls the loop up. See the arrow in the above pic. By the way this is not a detached stitch. All stitches are taken through the cloth.
I first came across this stitch ,thanks to this post by Mary Corbett of Needle'n' thread . I had downloaded one of the said books and this stitch was shown in one of the illustrations. This is the only reference I have at present.
This stitch is suitable for filling large areas. Here's a 'Huge' flower with Honeycomb Blanket stitch. Once the interior is filled ,you need to outline the edges. I can imagine table cloths, place mats,sarees and other dresses filled with flowers like these :)
I've one more idea with this one. Hmm.. may be in the next post.
Love, luck and sunshine,