Antique plant Caltha novae Zelandia drawn by Sarah Featon (1848–1927). Original from Museum of New Zealand. Digitally… https://www.rawpixel.com/image/8833/free-illustration-image-public-domain-sarah-featon-1800sFree Image from public domain licenseMarsh Marigold (1915) by Hannah Borger Overbeck. Original from The Los Angeles County Museum of Art. Digitally enhanced by… https://www.rawpixel.com/image/3228572/free-illustration-image-botanical-yellow-painting-drawingFree Image from public domain licenseKingcups (Caltha palustris) and pasque-flower (Pulsatilla vulgaris): entire flowering plants. Coloured etching by C. Pierre… https://www.rawpixel.com/image/13952216/image-flower-plant-medicineFree Image from public domain licenseMarsh marigold or kingcups (Caltha palustris): flowering stem. Watercolour. https://www.rawpixel.com/image/13951354/marsh-marigold-kingcups-caltha-palustris-flowering-stem-watercolourFree Image from public domain licenseA plant (Caltha radicans) related to kingcups: flowering stem and floral segments. Coloured engraving after J. Sowerby, 1810. https://www.rawpixel.com/image/13959319/image-flower-plant-artFree Image from public domain license