The outline of the leave is embroidered in closely worked coral stitch, which you find here.
I used 3 strands of Soie d'Alger 2133 light olive green
Along the lower half of the leaf I embroidered alternating chain stitch, which stitch you find here.
I used 2 threads of Soie d'Alger color 2133 light olive green and 2 threads of Soie Cristale color 5002 medium sage green
I found it a tough stitch. I had to take care not to split the thread when I went down through the same hole as silk is vulnerable. There were 4 threads in my needle, 2 shades of green that didn't differ a lot. Every stitch thay have to be swapped. It took me about 1,5 hour to stitch them. I am sure that it would be easier if you use e.g. pearl coton.