Fig. 2From: Biogeography of Coptis Salisb. (Ranunculales, Ranunculaceae, Coptidoideae), an Eastern Asian and North American genusDated phylogeny of Coptis inferred from the combined plastid and nuclear data using BEAST under the random clock model and birth-death tree prior. Gray bars represent 95% highest posterior density intervals. Nodes of interests were marked as 1–5 in bold. All nodes are strongly supported (PP > 0.95) except for one node (in dashed line). Plio., Pliocene; Plt., PleistoceneBack to article page