Figure 5. Coffee cuttings showing the necessity of leaves for root formation. 

 All cuttings were treated at the base by dipping into 50 per cent ethyl alcohol 

 containing 2 mg. of indolebutyric acid (IB) per cc. They were taken from 

 I year old plants and photographed 50 days later; the defoliated cuttings 

 had regenerated some small leaves at that time. The experiments took place 

 in Puerto Rico. 



