Figure 3: Pollen chemistry.
From: The importance of pollen chemistry in evolutionary host shifts of bees
UPGMA cluster based on Bray-Curtis dissimilarity index of global chemical composition of pollen (i.e., sterol, polypeptide and amino acids). Color refers to the non-host plants (white) or to host plants of either the Colletes succinctus group (black) or the Melitta leporina group (grey). The values near nodes are multiscale bootstrap resampling, and only values of main groups are shown.
