Sir William Jackson Hooker KH FRS FRSE FLS DCL (6 July 1785 – 12 August 1865) was an English botanist and botanical illustrator, who became the first director of Kew when in 1831 it was recommended to be placed under state ownership as a botanic garden. At Kew he founded the Herbarium and enlarged the gardens and arboretum. The standard author abbreviation Hook. is used to indicate this person as the author when citing a botanical name.