bunch of grapes
peduncle 
Offshoot that connects the cluster to the branch.
tendril 
Spiral strand enabling the vine branch to attach itself to a natural or artificial support.
branch 
Secondary offshoot of a branch or a vine shoot.
grape 
Differently colored fruit cultivated for the table or for wine making.
pedicel 
Terminal offshoot of the stem or twig; it first connects the flower, then the fruit, to the peduncle.