@misc{indiciae5e2b9c12fab1,
  title = {United States Exploring Expedition. During the year 1838, 1839, 1840, 1841, 1842 / Botany. Cryptogamia. Filices, including Lycopodiaceae and Hydropterides — Illustration, Filices. PL. 15},
  year = {1854},
  url = {https://www.biodiversitylibrary.org/page/43553660},
  note = {Source identifier: page-43553660}
}