According to the dichotomous key what is the name of the plant shown above ?

According to the dichotomous key, the name of the plant shown above is Albizia julibrissin.

A dichotomous key is a tool designed by scientists to allow its user to determine the identity of organisms or objects. The key contains several choices/questions mainly on the observable characteristics of the unknown organism. The questions are usually in steps and in two parts. The questions must be correctly answered because it guides the user to the correct name (scientific) of the unknown organism.  

According to the dichotomous key given above, from the first step, the plant shown has broad leaves (1b) which directs one to step 2. In the second step, the plant has many leaflets (2b) which directs one to step 4. It can be observed that the leaves edges are smooth. This last step which also states the right feature of the plant shows that the name of the plant is Albizia julibrissin.