“ The wreck of the vessel on the Falkland Isles, at the close of 1819, deprived him of more than half the botanical collections he had made in various parts of the world. In 1830–1833 he visited Chile, Peru and Brazil, and in 1836–1837 he acted as botanist to “La Bonite” during its circumnavigation of the globe. His theory accounting for the growth of plants by the supposed coalescence of elementary “phytons” involved him, during the latter years of his life, in much controversy with his fellow-botanists, more especially C. F. B. de Mirbel. He died in Paris on the 16th of January 1854. ”