Fig. 2From: Plastome phylogenomic analysis reveals evolutionary divergences of Polypodiales suborder DennstaedtiineaeChronogram of Polypodiales suborder Dennstaedtiineae. Blue horizontal bars on the nodes indicate 95% credible intervals of the divergence time estimates (95% HPD), and numbers on the bars indicate the median age (Ma). Geological timescale and subdivisions: E, Early; L, Late; M, MiddleBack to article page