Wow, I find the felt leaves scarf really great, too!
She made it with Nuno-felting of silk, sewing on of the leaf stitchings and cutting out of the middle pieces, but she writes that it should work with prefabricated felt, too.
When Nuno-felting, you felt the wool in thin layers into a prefabricated fabric, I did it before but not with silk but with a simple chiffon kerchief and it worked great.