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Phylogenetic relationships of species within the genus Portulaca, based upon the analyses of Ocampo et al. (2013) and Moore et al. (2018), showing the currently known distribution of C4 (red) and C3–C4 (blue) photosynthesis among them. The C4 distribution is from Ocampo et al. (2013), and the CAM distribution is from Koch and Kennedy (1980), Guralnick et al. (2002), Winter and Holtum (2017), Holtum et al. (2017a), Winter (2019), and the current study.
