[1] Peter Collinson, 1674-1768; a London woolen draper, and a correspondent of Bartram, who was the earliest native-born American botanist. [2] Charles Loring Brace, son of J. P. Brace. Eminent as founder of the Children’s Aid Society, New York. [3] The result was published in _Walks and Talks of an American Farmer in England_, written by his companion, Frederic Law Olmsted. [4] Ludolf Christian Treviranus, 1779-1864; professor of botany in Bonn. [5] J. B. G. W. Fresenius, M. D., 1808-1866. Wrote many contributions to mycology. [6] William Philip Schimper, 1808-1880; an eminent bryologist and paleontologist. [7] Alexander Braun, 1805-1877; a distinguished botanist, the early companion of Agassiz at Heidelberg; professor at Berlin. “As an investigator he stood in the front rank among the botanists of our time” [A. G.]. [8] Charles Henry Godet, 1797-1879; author of the _Flora of the Jura_. [9] F. A. W. Miquel, 1812-1871; director of the Amsterdam herbarium and professor of botany, Utrecht. [10] William H. De Vriese, 1806-1862; professor in the University of Leyden; author of many important works and memoirs. [11] Charles Louis Blume, 1796-1866; in charge of the Colonial Botanic Gardens at Java; later curator of the herbarium of the Royal Museum at Leyden. [12] Philip Franz Siebold, 1796-1866. Wrote _Flora Japonica_. He brought from Japan a large collection of curios when the country was rarely opened to a foreigner, and at the risk of his life. [13] Nathaniel Wallich, 1789-1854, a Dane by birth; a distinguished East Indian botanist. [14] Richard Congreve, fellow and tutor of Wadham. Among his many publications is _The Translation of the Catechism of Positive Religion_. [15] Thomas Thompson, 1817-1878; son of the distinguished chemist of Glasgow; explorer and traveler in India; director of the Calcutta Botanic Garden. [16] François André Michaux, 1770-1856; son of André Michaux, who traveled in North America from 1785 to 1796. Wrote _Forest Trees of North America_. [17] François Delessert, brother of Benjamin. Died 1868. Liberal patron of arts and sciences. [18] Louis René Tulasne, 1815; aide naturaliste at the Museum at Paris. [19] Charles Naudin; now director of the Jardin d’Acclimitation at Antibes. [20] Auguste Trécul, Paris; writer on Vegetable Histology. [21] Heinrich Rudolph August Grisebach, 1813-1879. Hannover and Göttingen. Professor of botany in the university. “A prominent and voluminous systematic botanist. His most important work a treatise on the Vegetation of the Earth.” [A. G.]. [22] Died 1892, much lamented. [23] Arthur Hugh Clough, 1819-1861. The poet was resident in America from November, 1852, to June, 1853.