Redraw the iris petals using wavy lines. Redraw the rose petals with many irregular lines. For the rosebud, show that the petals turn back by drawing a rough triangular shape at the tip.
Redraw the tulip petals so that the tips are slightly ruffled. Draw three of the leaf shapes with notched edges. Draw in the tops of the bell-shaped lilies of the valley.
Draw the centers of the daisies as irregular circles. Notch the ends of the daisy petals. Redraw the bowl, showing the back edge of it.