@misc{indiciaeca57cb23b25b,
  title = {George Engelmann : botanical notebook 45 : Polyanthus, Sagittaria, Echinodorus, Najadaceae, Najas, Potamogetonaceae, Cyperaceae, Gramineae — Illustration, [No.] 10302},
  year = {1859},
  url = {https://www.biodiversitylibrary.org/page/55983761},
  note = {Source identifier: page-55983761}
}