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Evolution of antipodal proliferation in Alismatales. (A) Phylogeny of Soltis et al. (2007). Antipodal proliferation has been reported in Hydrocharitaceae (Wylie, 1904), but more recent studies suggest that this is not actually the case (Johri et al., 1992). (B) Phylogeny of Graham et al. (2006). Parsimony analysis reveals that antipodal proliferation is the ancestral condition for Alismatales.
