Figure 4: The phylogenetic distribution of genome sizes for 2527 species of monocots. (a) The summary topology of monocots (based on [3]) with the number in brackets corresponding to the number of species with genome size data. The size of the ancestral genome (1C-value) reconstructed at different nodes of the topology using BayesTraits is also given. Arrows indicate direction of genome size change relative to the ancestral genome size reconstructed at the base of all monocots (  pg). (b) Histograms showing the distribution of genome sizes within each order, with the range of 1C-values given in brackets