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ML tree of 18 taxa of 87 plastid genes. Support values are only shown for nodes with bootstrap values less than 100%. The changes of gene contents among ferns are shown on the left. The novel intron-containing trnT-UGU is marked by a star. The filled and open circles indicate the genes present and absent, respectively, in the corresponding species. The gray circles denote pseudogenes. The filled triangles indicate that the trnL-UAA appears to be trnL-CAA in these species.
