When I first saw the working of this stitch, it looked like a variation of feather stitch. Further reading led to the idea of learning another new stitch. It does have common aspects with feather stitch. The working of the stitch is here on Queenie’s blog.
Started the first sample with the basic stitch, extended the space between two sides in the second sample, and worked the sides more closely in the third sample.
SSS.75.mahast-1
The extensions are growing longer in the first sample, two extensions are worked together to form this variation in the second row.
SSS.75.mahast-2
In the 1st sample, the stitches extending on both sides are worked slightly apart, making the line look  like wave. The second sample, I wanted to play with the extensions- make them vertical on one side, it did not work well.
SSS.75.mahast-3
More extensions are added in the first sample. And I seem to have worked the fourth sample again in the 2nd row!
SSS.75.mahast-4
The extensions are angled and are not worked in straight line in the first row. This variation is quite interesting.  Two Maidenhair stitch rows are worked together in the last sample.
SSS.75.mahast-5
The sampler-
SSS.75.maidenhair stitch sampler
It was an easy stitch to work. Whipping the stitch, adding french knots are two interesting additions to this stitch.