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Subjects: (Frederick Adolph),; 1809-1884; 1810-1888; 1810-1889; 1855-1940; Barter; Botanical specimens; Cactaceae; Cereus; Collectors and collecting; Correspondence; Echinocactus; Engelmann, George,; Gray, Asa,; Letters; Mogollon Mountains; New Mexico; Opuntia; Rusby, Henry Hurd,; Wislizenus, F. A</div>
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Rusby, Henry Hurd,</div>
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