Before revision:  We investigate the distribution among species using bipartite networks, and find that two heterogeneous distributions are conserved between several families: the power law distributions of the number of flavonoids in a species and the number of shared species of a particular flavonoid.
After revision:  We investigate the distribution among species using bipartite networks, and find that two heterogeneous distributions are conserved among several families: the power law distributions of the number of flavonoids in a species and the number of shared species of a particular flavonoid.