Step 1:
This is a green a4-size paper. Prefold and cut into three parts of the same size.

Step 6:
Fold over these two lines and turn the model.

Step 5:
Fold the prefolded lines to the right.

Step 2:
This is one of the three parts.
Fold it in half.

Step 4:
Fold both edges to the centerline. Unfold the folds of step 3 and 4 afterwards.

Step 3:
Prefold in half and fold both edges to this prefolded centerline.

Step 10:
Fold in half and turn the model again.

Step 8:
Press flat, see arrows.

Step 9:
Repeat step 7 and 8 six more times.

Step 7:
Fold over these two lines.

Step 16:
The trunk is made out of a large brown paper enhanced with white paper and metal- / florist wire.

Step 15:
Done... Below are four of these parts glued into a cluster.

Step 12:
Fold the edge in half.

Step 11:
Fold this edge to the left / inwards.

Step 14:
Curve the tiny leaves upwards.

Step 13:
Repeat step 11 and 12 on the other same edges.

Step 21:
Press and twist the upper part of each branch inwards / around the florist wire.

Step 19:
The main trunk of the tree is done now...

Step 20:
The branches are made out of smaller brown papers enhanced with white paper and metal- / florist wire.

Step 18:
Bend / curve the trunk on various places.

Step 17:
Press and twist the upper part of the trunk inwards.

Step 22:
Bend / curve each branch on several places.

Step 24:
Here I glued a cluster of leaves to the top of the trunk.
The leaf clusters are spreaded all over the tree on various places.

Step 23:
Here I glued a branch to the large trunk, see marked area.