@misc{indiciae9ab5239d1cfa,
  title = {George Engelmann : botanical notebook 58 : Ephedra and Equisetum — Illustration, [No.] 13396},
  year = {1882},
  url = {https://www.biodiversitylibrary.org/page/56112391},
  note = {Source identifier: page-56112391}
}