Step 1:
I folded the flowers out of 10 and 50 euro banknotes.
Fold along the colored edge.

Step 8:
Press the edges between the arrows against each other.

Step 6:
Fold this part in half.

Step 11:
This is the other side.
Open the four petals.

Step 10:
This is how the backside of the flower looks.

Step 9:
Fold the middle edge upwards, see small arrows.
Then press the lower edges upwards, see large arrows.

Step 5:
Fold over the 2 diagonal lines below, then over the 2 lines in the middle. And then over the 2 upper lines.

Step 7:
Fold the other three same parts in half too.

Step 3:
Fold the upper part backwards, use the prefolded lines as guidance.

Step 2:
Prefold, use the lower, left and right edges as guidance.

Step 4:
Now you've made a paper square.
Prefold in half over the two purple lines.

Step 12:
Curve / curl the petals backwards by rolling up the tips between your fingers.

Done!

This is a flower with another banknote used as stem. The stem is made by folding a banknote in half a few times and it's inserted into the back of the flower. This is a real nice way to make a complete bouquet of Origami Flowers.

This is a selfmade card with Money flowers attached to. I glued tiny paper sticks / stems to the card and slided the flowers on them. Another nice gift to give!