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Subjects: (James Watson),; 1774-1820; 1786-1859; 1801-1879; 1805-1877; 1809-1884; 1810-1888; 1817-1886; Braun, Alexander,; Callitrichaceae; Callitriche; Correspondence; Engelmann, George,; Gray, Asa,; Isoetaceae; Isoetes; Juncaceae; Juncus; Letters; Lichenologists; Location; Nomenclature; Nuttall, Thomas,; Plants; Potamogeton; Potamogetonaceae; Pursh, Frederick,; Robbins, J. W; Tuckerman, Edward,</div>
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Tuckerman, Edward,</div>
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