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By: Tweedy, Frank,Edition:Publication info:Volume: Tweedy to Engelmann, 1882-1883Series:Holding Institution: Missouri Botanical Garden, Peter H. Raven LibrarySubjects: 1809-1884 1826-1901 1854-1937 Abies Botanical specimens Cactaceae Cascade Range Collectors and collecting Coniferae Correspondence Echinocactus Effect of altitude on Engelmann, George, Identification Juniperus Letters Meehan, Thomas, Pinaceae Pinus Plants Taxaceae Taxus Tsuga Tweedy, Frank,BHL Collections: Engelmann Papers, Missouri Botanical Garden