@misc{indiciae5c17ec860e93,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2089},
  url = {https://www.biodiversitylibrary.org/page/56139941},
  note = {Source identifier: page-56139941}
}