I thought I would show my process on this particular flower drawing. I used a basic ball point pen to lightly sketch out my outline, and then went in with a felt tip ink pen, trying to follow the growth lines of the flower.
The completed flower...I am pleased with it, though I think it looks a bit static with the stiffly straight stem. However, that is the way that this flower grows. I should probably take a bit more 'artistic license' and be less literal.