Dendrogram

Dendrogram[{e1,e2,…}] constructs a dendrogram from the hierarchical clustering of the elements e1, e2, ….

Dendrogram[{e1->v1,e2->v2,…}] represents ei with vi in the constructed dendrogram.

Dendrogram[{e1,e2,…}->{v1,v2,…}] represents ei with vi in the constructed dendrogram.

Dendrogram[<|label1->e1,label2->e2,…|>] represents ei using labels labeli in the constructed dendrogram.

Dendrogram[data,orientation] constructs an oriented dendrogram according to orientation.

Dendrogram[tree] constructs the dendrogram corresponding to weighted tree tree. 

Please visit the official Wolfram Language Reference for more details and examples on core symbols.