Step 1:
Prefold in half four times

Step 6:
Squash-fold the flap.

Step 5:
Fold one flap straight upwards

Step 2:
Fold the corners to the center

Step 4:
Valley-fold over the two lines at the bottom right, mountain-fold over the two diagonal lines and valley-fold over the two lines at the top left

Step 3:
Turn the model

Step 10:
Press these edges downwards / flat

Step 8:
Unfold both folds.

Step 9:
Fold this edge downwards

Step 7:
Fold over these two lines

Step 16:
Repeat steps 13 to 15 with the other three triangle flaps.

Step 15:
Close the model again

Step 12:
Repeat steps 6 to 11 on the other three flaps.

Step 11:
Fold the triangle flap upwards.

Step 14:
Fold the triangle flap to the inside.

Step 13:
Open the model, see pink arrows.

Step 21:
Repeat steps 17 to 20 one more time, on the backside

Step 19:
Fold over the prefolded lines.

Step 20:
Fold the flap upwards

Step 18:
Pull the upper paper layer apart from the model / upwards.

Step 17:
Fold the left and right edge upwards.

Step 22:
Prefold over the purple line, then open the model

Step 28:
Repeat step 27 on the other five petals.

Step 25:
Fold this petal  upwards

Step 26:
This is the petal which is folded upwards.
Repeat step 25 with the other five petals

Step 24:
Press the model inwards again, without making new folding lines.

Step 23:
Sink-fold over the prefolded lines

Step 29:
Mountain-fold on this edge, repeat on the other same edges.

Step 27:
Mountain-fold over these two purple lines

Step 30:
Fold this corner downwards, repeat on the other same corners.

Step 31:
Fold the edges on these two places together by folding over the purple lines.

Step 32:
Pull outwards, see pink arrows

Step 33:
Mountain-fold on the tip of each petal.

Step 35:
Done.....

Step 34:
Fold / press the tip of each petal flat from aside

Step 36:
Take a long green rectangle for the leaf.
Fold over these two lines

Step 37:
Fold over the two short lines on the tip. Bend / curve the leaf a little.