Title: Correspondence
Subjects: Correspondence, Callitriche, Botanical specimens, Equisetum, Convovulaceae, Asclepiadaceae, Callitrichaceae, Compositae, Pinaceae, Paspalum, Equisetaceae
People: Samuel Barnum Mead (1799-1880), Thomas Nuttall (1786-1859), George Engelmann (1809-1884), Karl Sigismund Kunth (1788-1850), Giles H. Cornwell (-1849), A. Clapp, B. F. Shumard (1820-1869), Alexander Braun (1805-1877), W. M. Carpenter (1811-1848), Increase Allen Lapham (1811-1875), A. W. Chapman (1809-1899), François André Michaux (1770-1855), C. C. Parry (1823-1890), Asa Gray (1810-1888), George Vasey (1822-1893)