Title: Correspondence
Subjects: Correspondence, Characeae, Botanical specimens, Marsileaceae, Chara, Marsilea
People: George Engelmann (1809-1884), Samuel Edson Cassino (1856-1937), Timothy Field Allen (1837-1902), Joseph Dalton Hooker (1817-1911), Daniel Cady Eaton (1834-1895), Alexander Braun (1805-1877), Asa Gray (1810-1888)