The easiest way I know of (for a flush design) is to first add your stem with a thick green stringer. Then add a large dot in the color you want your flower to be at the top of your stem. Melt in the dot and use a raking tool or cold stringer (in the same color as your dot) to pull the top of the dot to a point or a taper (think spade). Next, add your stamen. I'd use a rod of dark yellow, heavily encased in clear and pull into a thick stringer. Heat the center the dot and push the thick stamen at an angle into the bead (don't push the stamen at a 90 degree angle to the surface of the bead). Use your rod nippers to nip off the excess stamen and melt it into the bead. Then, encase the entire bead to add depth and to give the flower more of a 3D look.
I'll try and make one tonight to post a picture tomorrow.
Hope that helps!
Karla