Robert Bentley (March 25, 1821 – December 24, 1893) was an Englishbotanist. He is perhaps best remembered today for the four-volume Medicinal Plants, published in 1880 with Henry Trimen and containing over three hundred hand-colored plates by botanist David Blair.
Robert Bentley was born in Hitchin, Hertfordshire in 1821. While apprenticed to a pharmacist in Tunbridge Wells, he developed an interest in botany. He subsequently studied medicine at King's College London, and became a Member of the Royal College of Surgeons in 1847 and a Fellow of the Linnean Society in 1849.
Bentley served as botany lecturer at the Medical School of the London Hospital, and in 1859 became Professor of Botany at King's College London.
In 1874, Bentley was elected a Fellow of the Royal Pharmaceutical Society, and he served as joint editor of the British Pharmacopeia of 1885.
A Text-book of Organic Materia Medica, comprising a description of the vegetable and animal drugs of the British Pharmacopoeia, with other non-official medicines, etc. (1887)