Add a stem and put the flower into a bunch a flowers.
Here is a new lily, whose mid looks more like passion flowers.
A 12 cm square makes a 5.5 cm long flower, 10.5 cm in diameter.
It has a non-linear folding sequence which mainly aims at placing a bird base in all four corners.
The folding
First preliminary fold in each corner
Start with a square, colored side up (I know, I know, the photo shows white side
up, and the instructions ends up with a white flower...just made a mistake)
Mark the diagonals.
Book fold in the middle.
Fold the edge to the center fold.
Repeat behind.
Unfold.
And repeat the other way.
Fold corners to the center.
And unfold.
Turn over.
Press the four quarter-centers down. This is 4 times the crease pattern of the
preliminary fold.
Assemble the preliminary fold in each corner and press flat.
Finishing the bird base pattern in each corner and assemble basic flower corpus
Petal fold in each corner.
Thus.
Detail: Along each of the petal folds, mountain fold in the layers below.
Detail finished one side.
Now finished along all 4x2 petal sides.
And unfold everything again. You see the pattern, but in the center square some
valley folds should be turned into mountain folds.
So fold them the other way, two opposite again.
Like this. Repeat 3 times.
All 4 are ready - your clearly see the bird base crease pattern in each corner.
Begin to push the model together, now going 3D. The technique is like that of the
Jackstone (by Jack Skillman, diagram in Harbin: Origami 2)
Like this, seen from the above ...
... and from the side.
Make the petals and finish the flower
Tip a petal to the side ...
... and pull it out so the the "top" of the bird base is flattened.
Repeat with the 3 remaining petals.
Turn. Note that it is quite open and loose.
Push each of the flattened "tops" up - use two fingers in each side of the petal
and push. In the photo they are below the petals.
Press the sides of each petal together - only the half near the center of the
flower.
Repeat on the other three petals.
Curve the petals a little (over a finger or a pencil). Done.