Title: Plant lists, notes, and correspondence
Subjects: Plants, Scientific expeditions, Frémont Expedition (3rd : 1845-1847), Frémont Expedition (2nd : 1843-1844), Explorers, Discovery and exploration
Places: West (U.S.)
People: John Torrey (1796-1873), John M. Bigelow (1804-1878), George Engelmann (1809-1884), Asa Gray (1810-1888), John Charles Frémont (1813-1890)