[139] Carl H. Schultz-Schultzenstein, 1798-1871; professor of physiology in the University of Berlin. Wrote voluminously upon Cyclosis and the Vessels of the Latex, etc. [140] Dr. Charles Danbeny, G. B., 1795-1867; professor of botany and rural economy at Oxford; chemist and geologist. [141] William Oakes, 1799-1848. “The most thorough and complete collector and investigator of New England plants” [A. G.]. [142] Alphonse Wood, 1810-1881; author of popular botanical text-books. [143] His brother, then living with him in Cambridge to enter Harvard. [144] Christian Hendrik Persoon, 1755-1838; a botanist at the Cape of Good Hope. Died in Paris at a very advanced age. Fungologist. [145] The third course of Lowell lectures. [146] Augustus Fendler, 1813-1883. Came from Prussia to America in 1840. Collected in New Mexico, and on the Andes about Tovar in Venezuela, and in Trinidad. “A close, accurate observer, a capital collector and specimen-maker; his distributed specimens are classical. Of a scientific turn of mind in other lines than botany” [A. G.]. [147] Spencer F. Baird, afterward widely known as secretary of the Smithsonian Institution. [148] A relative left Nuttall a comfortable little estate and property on condition that he should not be away from it more than three months in the year. He managed to come to America again by taking the three last months of one year and the three first of the next. [149] Increase Allen Lapham, 1811-1875; author of a Catalogue of Plants in the Vicinity of Milwaukee. [150] Charles Pickering, 1805-1878. “Author of _Geographical Distribution of Plants and Animals and Man’s Record of his own Existence_, largely a record of changes in the habitat of plants. A monument of wonderful industry” [A. G.]. [151] John P. Brace, Litchfield, Conn.; an early botanist and mineralogist. His herbarium went to Williams College. [152] A. Wislizenus, M. D., b. 1810. Explored New Mexico and Mexico; was arrested as a spy. On returning to the United States published a memoir of the tour, 1846-1847. [153] Josiah Gregg, died in California, 1850; made excellent collections in Chihuahua and in the Valley of the Rio Grande. Author of the _Commerce of the Prairies_. [154] Leo Lesquereux, 1806-1889; the leading fossil botanist of America, and a distinguished bryologist. [155] Sprague made, under Dr. Gray’s directions, some drawings in color of the work planned, _The Trees of North America_. The work was never completed, too many things, expense, etc., coming in the way, but the few plates printed and colored by Prestele were issued in a small quarto pamphlet by the Smithsonian Institution in 1891. [156] John Amory Lowell, 1798-1881; a Boston merchant, and a liberal patron of botany. He bought many valuable books and collected a fine herbarium. He shaped the policy and direction of the Lowell Institute founded by his cousin, John Lowell.