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Provided by USDA Forest Service.
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Provided by USDA Forest Service.
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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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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, Kansas, Riley Co., Manhattan.
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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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E.S. Shipp. Provided by National Agricultural Library. United States, Virginia, George Washington National Forest.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Provided by USDA Forest Service.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. United Kingdom, England.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. United Kingdom, England, Kew, Royal Botanic Gardens.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. Serbia, Belgrade.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. United States, California, Los Angeles Co., Arcadia, Los Angeles County Arboretum.
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, California, Santa Barbara Co., Santa Barbara.
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, Arizona, Pima Co., Tucson.
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W.A. Jackson. Provided by National Agricultural Library. United States, New Mexico.
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Rex King. Provided by National Agricultural Library. United States, Arizona, Tonto National Forest.