Yellow flowers pterocarpus erinaceus png vintage sketch https://www.rawpixel.com/image/2611560/free-illustration-png-herbal-flower-watercolor-leavesView licenseBarwood (Pterocarpus erinaceus) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. https://www.rawpixel.com/image/327118/premium-illustration-psd-antique-barwood-botanicalView licenseBarwood (Pterocarpus erinaceus) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John Stephenson… https://www.rawpixel.com/image/327136/free-illustration-image-barwood-flower-1800sFree Image from public domain license