De Jussieu, the name of a French family which came into prominence towards the close of the sixteenth century, and was known for a century and a half for the botanists it produced. The following are its more eminent members: Antoine de Jussieu (1686–1758), born in Lyon on 6 July 1686, was the son of Christophe de Jussieu (or Dejussieu), an apothecary of some repute, who published a Nouveau traité de la thériaque (1708). Antoine studied at the University of Montpellier, and travelled with his brother Bernard through Spain, Portugal, and southern France. He went to Paris in 1708; J. P. de Tournefort, whom he succeeded at the Jardin des Plantes, dying in that year. His own original publications are not of marked importance, but he edited an edition of Tournefort's Institutiones rei herbariae (3 vols., 1719), and also a posthumous work of Jacques Barrelier, Plantae per Galliam, Hispaniam, et Italiam observatae, &c. (1714). He practised medicine, chiefly devoting himself to the very poor. He died in Paris on 22 April 1758. Bernard de Jussieu (1699–1777), a younger brother of the above, was born in Lyon on 17 August 1699. He took a medical degree at Montpellier and began practice in 1720, but finding the work uncongenial he gladly accepted his brother's invitation to Paris in 1722, when he succeeded Sebastien Vaillant as sub-demonstrator of plants in the Jardin du Roi. In 1725 he brought out a new edition of Tournefort's Histoire des Plantes qui naissent aux environs de Paris, 2 vols., which was afterwards translated into English by John Martyn, the original work being incomplete. In the same year he was admitted into the Académie des sciences, and communicated several papers to that body. Long before Abraham Trembley (1700–1784) published his Histoire des polypes d'eau douce, Jussieu maintained the doctrine that these organisms were animals, and not the flowers of marine plants, then the current notion; and to confirm his views he made three journeys to the coast of Normandy. Singularly modest and retiring, he published very little, but in 1759 he arranged the plants in the royal garden of the Trianon at Versailles, according to his own scheme of classification. This arrangement is printed in his nephew's Genera, and formed the basis of that work. He cared little for the credit of enunciating new discoveries, so long as the facts were made public. On the death of his