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J.B. Serberg. Provided by National Agricultural Library. United States, Idaho.
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E.S. Shipp. Provided by National Agricultural Library. United States, Colorado, Arapaho National Forest.
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Herman, D.E., et al. Provided by ND State Soil Conservation Committee. United States, North Dakota.
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Herman, D.E., et al. Provided by ND State Soil Conservation Committee. United States, North Dakota.
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Herman, D.E., et al. Provided by ND State Soil Conservation Committee. United States, North Dakota.
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Herman, D.E., et al. Provided by ND State Soil Conservation Committee. United States, North Dakota.
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, California.
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Fred E. Dunham. Provided by National Agricultural Library. United States, California.
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E.L. Kolbe. Provided by National Agricultural Library. United States, Washington, Skamania Co., Columbia National Forest, Wind River Arboretum.
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T.P. Lukens. Provided by National Agricultural Library. United States, California, Cleveland National Forest.
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L.C. Miller. Provided by National Agricultural Library. United States, California, Angeles National Forest, San Gabriel Mountains.
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Provided by National Agricultural Library. United States, California.
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, Virginia, Falls Church.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection.
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W.D. Brush. Provided by National Agricultural Library. United States, District of Columbia, Washington.
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W.D. Brush. Provided by National Agricultural Library. United States, District of Columbia, Washington.
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W.D. Brush. Provided by National Agricultural Library. United States, District of Columbia, Washington.
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W.D. Brush. Provided by National Agricultural Library. United States, District of Columbia, Washington.
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W.D. Brush. Provided by National Agricultural Library. United States, Maryland.
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W.D. Brush. Provided by National Agricultural Library. United States, Maryland.
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W.D. Brush. Provided by National Agricultural Library. United States, Maryland.
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Alfred R. Liddicoet. Provided by National Agricultural Library. United States, California.
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Bluford W. Muir. Provided by National Agricultural Library. United States, Arkansas.
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Bluford W. Muir. Provided by National Agricultural Library. United States, Arkansas.