[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.