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Distribution of A. phalloides throughout California and the geographic ranges of associated host plants. A significant association between the distribution of A. phalloides and a host range is marked by the thicker borders around Q. agrifolia, C. cornuta var. californica, and P. muricata. The distribution of A. phalloides is largely within the distribution of its most frequent host, Q. agrifolia. See Supplementary Table S4 for statistics.
