Title: Correspondence
Subjects: Correspondence, Plants, Surveys, Botanical specimens, Botany, Plant collecting
Places: United States, New Southwest, West (U.S.)
People: Sereno Watson (1826-1892), George Engelmann (1809-1884), Joseph T. Rothrock (1839-1922), George M. Wheeler (1842-1905)
Time periods: 1871-1873