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Subjects: 1809-1884; 1810-1888; -1898; Alismataceae; Botanical specimens; Correspondence; Engelmann, George,; Gray, Asa,; Identification; Isoetaceae; Isoetes; Letters; Manual of the botany of the northern United States; Sagittaria; Tatnall, Edward,</div>
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Tatnall, Edward,</div>
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