Q.Can The Stamen Of The Peony Plant Be Used To Start New Plants?
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Certified GKH Gardening Expert
Not easily. This requires very precise conditions to perform tissue cultures. This is something that I don't recommend anyone that does not have quite a bit of laboratory experience to take on.
This article will explain agar use for plants:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/agar-growing-medium.htm
This document from Michigan State University will give you a decent run-down of performing a tissue culture:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/agar-growing-medium.htm