The fossil monocot Limnobiophyllum scutatum: resolving the phylogeny of Lemnaceae.

@article{Stockey1997TheFM,
  title={The fossil monocot Limnobiophyllum scutatum: resolving the phylogeny of Lemnaceae.},
  author={Ruth A. Stockey and Georgia L. Hoffman and Gar W Rothwell},
  journal={American journal of botany},
  year={1997},
  volume={84 3},
  pages={
          355
        }
}
More than 200 specimens of Limnobiophyllum scutatum (Dawson) Krassilov have been recovered from lacustrine claystones in the Paleocene Paskapoo Formation near Red Deer, Alberta. The plant was a floating, aquatic angiosperm with helically arranged, ovate leaves attached in small rosettes. Rosettes are interconnected by stolons and bear simple adventitious roots as well as larger branching roots that appear to have vascular tissue. Leaves are pubescent, aerenchymatous, with 12-14 campylodromous… 
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TLDR
Fossil free-floating stoloniferous plants each with one or two sessile suborbicular to reniform leaves of different size as well as numerous simple and one orTwo longerbranched roots on a reduced main stem are included.
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TLDR
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