A species of Thottea: branch with flowers and pods and separate pods and sectioned flower. Coloured line engraving. https://www.rawpixel.com/image/13959840/image-flower-plant-treeFree Image from public domain licenseA plant (Aristolochia hyperborea) related to birthwort: flowering stem. Coloured etching by F. Smith, c. 1834, after himself. https://www.rawpixel.com/image/13960308/image-cartoon-flower-plantFree Image from public domain licenseFour flowering plants, including asarabacca (Asarum europaeum) and two mercury plants (Mercurialis species).… https://www.rawpixel.com/image/13961629/image-flower-plant-grassFree Image from public domain licenseAsarabacca (Asarum europaeum L.): flowering stem with separate floral segments and cross-sections of the stem and a… https://www.rawpixel.com/image/13955443/image-paper-flower-plantFree Image from public domain licenseA plant related to birthwort, (Aristolochia longa L.): flowering stem with separate rhizome and sections of fruit. Coloured… https://www.rawpixel.com/image/13953282/image-flower-plant-artFree Image from public domain licenseA plant (Aristolochia rotunda L.) related to birthwort: entire flowering plant. Coloured etching by M. Bouchard, 1774. https://www.rawpixel.com/image/13963147/image-plant-leaf-public-domainFree Image from public domain licenseFour flowering plants, including a cowslip (Primula veris), comfrey (Symphytum officinale) and a bulrush (Scirpus species).… https://www.rawpixel.com/image/13953603/image-flower-plant-grassFree Image from public domain licenseA plant (Aristolochia sp.) related to birthwort: part of twining, flowering stem. Coloured etching by M. Bouchard, 1774. https://www.rawpixel.com/image/13966768/image-flower-plant-treeFree Image from public domain license