​JACKSON, Benjamin Daydon (1846—). A noted British botanist, born in London and educated at private schools. He is perhaps best known as the compiler of Index Kewensis (q.v.), a reference book which appeared from 1893 to 1895, and which was at once accepted as authority throughout the world for names of flowering plants. In 1880 he was elected president of the Linnæan Society. Among his other works are Guide to the Literature of Botany (1881); Vegetable Technology (1882); Glossary of Botanical Terms (1900).