I have to agree with Ricky, that book is a must read. I can't find the link for it, but someone here posted it. Well worth the money, and it's a real easy read.
I'm not sure how big this stamp is- http://www.tandyleatherfactory.com/home/department/Tools/Stamps-Craftool/68086-00.aspx?feature=Product_279 but how about using it as the leaves, and I'm still thinking about the stem.......
Try "Calligraphic ornaments" for the real fancy stuff. I have the Dover book with that name, and it's been a great source of frustration for my ham fisted self. Just can't get the gentle touch needed.