Marshmallow, Althaea officinalis. Chromolithograph after a botanical illustration by Walther Muller from Hermann Adolph Koehler's Medicinal Plants, edited by Gustav Pabst, Koehler, Germany, 1887 Stock Photo - Alamy
Liquorice or licorice, Glycyrrhiza glabra. Chromolithograph after a botanical illustration from..., Stock Photo, Picture And Rights Managed Image. Pic. MEV-12489190 | agefotostock
Contact allergy and medicinal herbs - Aberer - 2008 - JDDG: Journal der Deutschen Dermatologischen Gesellschaft - Wiley Online Library
Citrullus colocynthis - Wikipedia
Kola Nut Poster by Georgia Fowler - Fine Art America