Alpine buckthorn (Rhamnus alpinus) from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/568331/alpine-plantsFree Image from public domain licenseItalian buckthorn, Rhamnus alaternus from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/568340/italian-buckthorn-branchFree Image from public domain licenseCommon buckthorn, Rhamnus catharticus from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/568212/common-buckthorn-branchFree Image from public domain licenseRhamnus prinoides L'Herit. (African Buckthorn): finished drawing without details and with berries added https://www.rawpixel.com/image/9198618/image-watercolors-vintage-public-domainFree Image from public domain licenseEquisetum Hiemale (Winter Horsetail) enlarged 10 times, Rhamnus Purshiana (Californian Bearberry) enlarged 25 times, and… https://www.rawpixel.com/image/2222832/karl-blossfeldt-macrophotographyFree Image from public domain licenseAlpine buckthorn plant transparent png https://www.rawpixel.com/image/568306/alpine-buckthorn-branchView licenseVintage common buckthorn branch plant illustration https://www.rawpixel.com/image/568404/common-buckthorn-branchView licenseVintage European buckthorn branch plant illustration https://www.rawpixel.com/image/568291/european-buckthorn-branchView licenseVintage Italian buckthorn branch plant illustration https://www.rawpixel.com/image/568335/italian-buckthorn-branchView licenseVintage alder buckthorn branch plant illustration https://www.rawpixel.com/image/568352/alder-buckthorn-treeView licenseAlder buckthorn, Rhamnus frangula from Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/568389/alder-buckthorn-treeFree Image from public domain licenseVintage alpine buckthorn plant illustration https://www.rawpixel.com/image/568225/alpine-buckthorn-branchView licenseEuropean buckthorn, Rhamnus buxifolius from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/568270/european-buckthorn-branchFree Image from public domain licenseBuckthorn with green leaves and blueberry png vintage https://www.rawpixel.com/image/2611705/free-illustration-png-blueberry-flower-plantView licenseEquisetum Hiemale (Winter Horsetail) enlarged 10 times https://www.rawpixel.com/image/2222777/vintage-horsetail-plant-photographView licenseBuckthorn (Rhamnus catharticus) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John Stephenson… https://www.rawpixel.com/image/327104/free-illustration-image-flower-watercolor-botanicalFree Image from public domain licenseAlder buckthorn branch plant transparent png https://www.rawpixel.com/image/568383/alder-buckthorn-treeView licenseItalian buckthorn branch plant transparent png https://www.rawpixel.com/image/568347/italian-buckthorn-branchView licenseCommon buckthorn branch plant transparent png https://www.rawpixel.com/image/568428/common-buckthorn-branchView licenseEuropean buckthorn branch plant transparent png https://www.rawpixel.com/image/568254/european-buckthorn-branchView licenseBuckthorn (Rhamnus catharticus) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. https://www.rawpixel.com/image/327011/premium-illustration-psd-rhamnus-antique-botanicalView license