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Torrey, John (1796-1873)(6)
Humboldt, Alexander von (1769-1859)(2)
Hornemann, Jens Wilhelm (1770-1841)(1)
Lehmann, Johann Georg Christian (1792-1860)(1)
Martius, Carl Friedrich Philipp von (1794-1868)(1)
Oemler, August Gottlieb(1)