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By: Gerard, W. R., (William Ruggles),Edition:Publication info:Volume: Gerard to Engelmann, 1880-1882Series:Holding Institution: Missouri Botanical Garden, Peter H. Raven LibrarySubjects: (William Ruggles), 1809-1884 1816-1882 1820-1892 1841-1914 Cactaceae Correspondence Engelmann, George, Gerard, W. R., Hogg, Thomas, Leggett, William Henry, Letters Opuntia rafinesquii PollinationBHL Collections: Engelmann Papers, Missouri Botanical Garden