Scottish botanist. Lecturer in botany, King's College, Aberdeen, 1839–49. Professor of natural history, Queen's College, Belfast, 1849–60. Professor of botany, Aberdeen University, 1860–77. Specialised in the study of marine algae and described many of the collections sent to the Royal Botanic Gardens, Kew. FRS 1881.
Sources: Desmond, Ray 1994 DNB
(See the bibliography for full references to sources)