Not any that I know of. But you can make the stem really short.
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how the flowers is attached to the stem
Yes! all flowers need a stem to survive. They use a stem to suck the water up through so they can drink it.
how the flowers is attached to the stem
You just do it like how you arrange real flowers. Though you can just bend the stem for the fake flowers with wire-stems. You can also have someone do it for you (the store that sells them.)
Above ground system in plants consists of stem, leaves and flowers.
Stem, Leaves, Roots, Flowers, Fruit.
the flower is attached to the stem by being connected
how the flowers is attached to the stem
you can make santan reproduce by cutting a stem and letting the cut part to absorb water, this encourages the stem to make roots and if you think the roots are good enough you can plant it as is.
Trees have a trunk, flowers have a stem.