Hi Anne!
This picture is of the seed of Shepherd's Purse.
Spoon shaped petals reminds me of a couple of flowers but they're not tiny... sorry nothing is coming to me but I'm not all that familiar with flower arrangements.
Do you have a picture of the plant you're trying to identify? If you do, you can post it in the plant identification thread here:
https://garden.org/forums/view...
Once there, scroll down to the bottom of the page and you will see where you can start a new thread for the plant you are trying to identify. Good luck.
