Raised Fishbone Stitch
Bring the needle up at 1 through the tip of the leaf shape, then down at 2 and up at 3, parallel with 2. Stitch up and over the centre stitch and insert at 4. Repeat the other way, coming up at 5 parallel to 4, then down again at 6. Keep alternating these diagonal stitches, moving downwards until the shape is filled.