For TAST 2012 week 2 the stitch was buttonhole stitch, you can find it here. The seam treatment is embroidered with DMC pearl 5, just a basic buttonhole stitch. The real color is lilac ;)
For the flowers I arranged the long and short buttonhole stitch around the center of the flower.
The stem is embroidered in stemstitch. The leaves in buttonhole stitch, this time used as a filling stitch. For the flowers, stem and leaves I used 1 strand of DMC stranded coton.
The hearts are embroidered in french knots with 4 strands of DMC stranded coton.
The lower part of the middle section is embroidered in a scalloped filling buttonhole stitch.
More about this part of the carnation is found here.