@misc{indiciae396e1cbf4f69,
  title = {Leçons de botanique. : [Supplementary material in Charles Darwin's copy] / Leçons de botanique — Illustration, Pl. 21},
  year = {1841},
  url = {https://www.biodiversitylibrary.org/page/33856467},
  note = {Source identifier: page-33856467}
}