Fill the leaf with black color, rotate to any angle, and then place it near the beginning of the branch.
Duplicate the leaf, move the copy to the end of the branch and reduce its size. Select both leaves, then go to Object> Blend> Make (Option / Alt + Cmd / Ctrl + B). Now go to Object> Blend> Blend Options or double click on the Blend Tool (W) icon in the Tools panel and set the appropriate number of steps. Go to Object> Blend> Expand , and then ungroup the objects (Cmd / Ctrl + Shift + G). In the Align panel select the Align to Key Object option, set 0px in the numeric field, then press the Horizontal Distribute Space button. Duplicate and reflect the largest leaf using the Reflect Tool (O). Increase the size of the copy, then place it as shown in the following picture. Using the technique, which has been described in steps 7-9, create leaves on the bottom of a laurel branch. Select all the created objects and save them as Art Brush in the Brushes panel. With the help of the Pen Tool (P) create a curved path similar to the one shown in the following picture. Apply Art Brush to the selected path.
To begin this laurel wreath tutorial open your Adobe Illustrator and create a new document (Cmd / Ctrl + N). Your artboard can be of any size. The laurel wreath that we’re creating will work equally well in the RGB and in the CMYK color modes. Create a circle using the Ellipse Tool (L), then move it to the side, holding the Shift and Option / Alt keys. This will result in a duplication of the circle. Objects should overlap each other as shown in the picture below. Select both circles, and then press the Intersect in the Pathfinder panel. Change the position of the upper handle as shown in the picture below. Using the Pen Tool (P) create a curved segment from the lower point of the leaf. Apply a triangular profile to this path and increase the width of the path in the Stroke panel. Keeping the curved segment selected, go to Object> Path> Outline Stroke . Select two objects, then press the Minus Front in the Pathfinder panel. Create a triangle stretched horizontally using the Pen Tool (P). This is the basis for the laurel wreath branch.