Title: Correspondence
Subjects: Correspondence, Fir, Oak, Catalpa, Pine, Bignoniaceae, Identification, Pinaceae
People: J. A. Warder (1812-1883), Thomas Nuttall (1786-1859), George Engelmann (1809-1884), John Leonard Riddell (1807-1867), Leo Lesquereux (1806-1889), Thomas Meehan (1826-1901), C. S. Rafinesque (1783-1840)