“Columbine ~ Ancoli, ~ die Aglei.” Plate 12. Page 12. Anna Martin, artist. Collections of the Smithsonian Libraries. Biodiversity Heritage Library, digitalizing partner. In the public domain due to age. via https://archive.org/details/planteetsesappl00Gras/page/12/mode/2up“Courd ~ Courge ~ der Kürbisse.” Plate 13. Page 30. Maurice Pillard Verneuil, artist. Collections of the Smithsonian Libraries. Biodiversity Heritage Library, digitalizing partner. In the public domain due to age. via https://archive.org/details/planteetsesappl00Gras/page/n29/mode/2up“Courd ~ Courge ~ der Kürbisse.” Plate 14, page 32. Maurice Pillard Verneuil, artist. Collections of the Smithsonian Libraries. Biodiversity Heritage Library, digitalizing partner. In the public domain due to age. via https://archive.org/details/planteetsesappl00Gras/page/n31/mode/2up“Courd ~ Courge ~ der Kürbisse.” Plate 15, page 34. C. G. Schlum, artist. Collections of the Smithsonian Libraries. Biodiversity Heritage Library, digitalizing partner. In the public domain due to age. via
“Etudes de Bluets et de Paquerelles.” Image 5. Collection of the BnF Gallica, the National Library of France. In the public domain due to age. via https://gallica.bnf.fr/ark:/12148/btv1b52512760g/f5.item“Études de capucines, et Lierre.” Image 13. Collection of the BnF Gallica, the National Library of France. In the public domain due to age. via b