I have made a listing of the flora of some region, obviously I made the sampling using polygons covering a wide range of the studied area.

Now I want to classify the polygons I have made by their similarity/dissimilarity on the diversity and abundance of the flora.

The questions comes next, how can I do it? Which index or coefficients should I use? (I have find bray-curtis, jaccard and other)

And which algorithm/method should I use for the clustering diagram?

Any help or literature that helps me to clarify this will be much appreciated.