@misc{indiciaefabf01be745e,
  title = {Leçons de botanique / Leçons de botanique. : [Supplementary material in Charles Darwin's copy] — Illustration, Pl. 7},
  year = {1841},
  url = {https://www.biodiversitylibrary.org/page/33856439},
  note = {Source identifier: page-33856439}
}