The chair of Botany at Cambridge was created in 1724 for Richard Bradley (1724–1732), and as of 2016, fifteen botanists have held that position, including John Martyn (1733–1762), John Stevens Henslow (1825–1861) and Harry Marshall Ward (1895–1906) ("see list"). In 1991 the Botany School was renamed the Department of Plant Sciences. In 2005 the title was changed to Regius Professor of Botany, the appointment as of 2016 is that of Professor Sir David Baulcombe. The current Plant Sciences building on the Downing Site was constructed in 1904 during Ward's tenure, when the main areas of research were morphology, systematics, pathology and physiology. Morphologists in that period included Agnes Arber, John Corner, and Kenneth Sporne, whose phylogenetic approach was well ahead of the seminal work of Willi Hennig.