 He was the co-author of a popular flora, which sold a quarter of a million copies, and of many other books, papers and reviews.He recorded more than 3,000 species in the British Isles gathered from throughout the UK and seen a vast range of rarities – aliens being a particular focus.An amateur, McClintock also worked across the worlds of botany and horticulture, and organised a scientific survey of the natural history of Buckingham Palace Garden.