Figure 4 .
Genetic variation withinViburnumsubclades. Bar graph showing the mean genetic distances calculated using all included Viburnum species and genetic distances calculated using the included species from four clades nested within Viburnum. The maximum genetic distance of each gene region or regions is indicated by a thin bar extending from the mean.
Clement and Donoghue BMC Evolutionary Biology 2012 12:73 doi:10.1186/1471-2148-12-73