Shown below is another method of embroidering a rosebud, using the buttonhole-knot technique.
Embroider 3 pointed buttonhole-knot petals, as shown. Click here for the tutorial.
With green thread, work single buttonhole knots on the 2 petals shown and at the base of the petal. Make a straight stitch for the stalk.
If you prefer, work 2 more single buttonhole-knot stitches at both sides of the rosebud to complete the calyx.