Additional file 2.

Chronogram of the unconstrained tree. Numbers after family name are species number considered for our analysis following Stevens [13] for angiosperms and gymnosperms, Crosby et al. [8] and Buck and Goffinet [9] for mosses, Smith et al. [11] for ferns and Stotler et al. [43] for liverworts. The x axis indicate time in million years. The placement of 11 families in which no molecular data could be collected are indicated; they were connected to node numbers as follows: 1 - Monocarpaceae, 2 - Sandeothallaceae, 3 - Chonecoleaceae, 4 - Grolleaceae, 5 - Trichotemnomaceae, 6 - Viridivelleraceae, 7 - Microtheliaceae, 8 - Sorapillaceae, 9 - Hapthantaceae, 10 - Balanophoraceae and 11 - Rafflesiaceae.

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Fiz-Palacios et al. BMC Evolutionary Biology 2011 11:341   doi:10.1186/1471-2148-11-341