@misc{indiciae94be1600f835,
  title = {Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin — Illustration, Page 48 / Fig. 20},
  year = {1905},
  url = {https://www.biodiversitylibrary.org/page/28715607},
  note = {Source identifier: page-28715607}
}