Abstract
Recent studies have transferred several species previously attributed to the fern genus Oenotrichia to other genera, and even out of the Dennstaedtiaceae to other families. However, the relationship of the type species, O. maxima from New Caledonia, has not previously been investigated using DNA sequences. With phylogenetic analyses of chloroplast DNA sequences, we verify the placement of Oenotrichia within the Dennstaedtiaceae. Moreover, O. maxima actually nests along with Leptolepia in a clade of Dennstaedtia. Dennstaedtia itself is non-monophyletic, with a second clade being more closely related to Microlepia. We outline what is required to resolve the generic taxonomy of this group. We also find that samples attributed to Saccoloma are polyphyletic, with some falling inside the Dennstaedtiaceae and others outside.
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