@misc{dryad_pk93r,
  title = {Data from: An expanded plastid phylogeny of Marsilea with emphasis on North American species},
  author = {Whitten, WM and Jacono, CC and Nagalingum, NS},
  year = {2012},
  journal = {American Fern Journal},
  URL = {http://dx.doi.org/10.5061/dryad.pk93r},
  doi = {doi:10.5061/dryad.pk93r},
  publisher = {Dryad Digital Repository}
}