I've been playing with the Marvelous Marigolds stamp set from AMuse Studio, which I think is a good stamp set for techniques - it has both bold and outline stamps. It has flower heads and a leaf, but no stem, which I thought was weird, until it hit me that a stem is not that hard to draw; my experience with long skinny stamps would suggest that a stem would be easier to draw than stamp. so, I put it to the test:
Drawing the stem was fun, and I like that the next marigold I stamp can have a completely different shape.
Kaboodle Doodles - Flowers
Lollipop Crafts - CAS
Let's Ink It Up - Flowers
Stemplesonnen - Blumen
Crafty Purple Frog - yellow and green
Gingersnap Creations - only 2 colors