@misc{indiciae3ff03af088ee,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2158},
  url = {https://www.biodiversitylibrary.org/page/56154235},
  note = {Source identifier: page-56154235}
}