@ARTICLE{TreeBASE2Ref18478, author = {Michael Lee Moody and Donald H. Les}, title = {Systematics of the Aquatic Angiosperm Genus Myriophyllum (Haloragaceae)}, year = {2010}, keywords = {}, doi = {10.1600/036364410790862470}, url = {}, pmid = {}, journal = {Systematic Botany}, volume = {35}, number = {1}, pages = {121--139}, abstract = {Abstract--The angiosperm genus Myriophyllum (Haloragaceae) is among the most speciose of the aquatic core eudicot genera having a cosmopolitan distribution with its center of diversity in Australia (> 36 endemics). The widespread invasive species of the genus (M. aquaticum, M. heterophyllum, and M. spicatum) have drawn attention from international natural resource managers. Myriophyllum species are notoriously difficult to identify using vegetative morphology alone, which is commonly all that is available for these highly clonal plants. The relationships among taxa have been difficult to determine with suspected parallelisms in sepal and petal loss, reduced stamen number and sex expression. A molecular phylogenetic approach was taken to examine relationships among taxa and to employ molecular markers for the reliable identification of Myriophyllum taxa. This study included ≈80% of the known Myriophyllum species. Both nrDNA ITS and cpDNA matK and trnK data were used to examine phylogenetic relationships among species. The nrDNA ITS data proved highly variable and could differentiate between all but one species pair examined in these analyses. These analyses also uncovered multiple cryptic species among Australian complexes. Phylogenetic results support major realignments in the subgeneric classification including the rare monotypic genus Meziella nested within Myriophyllum.} }

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