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F.S. Baker. Provided by National Agricultural Library. United States, Utah.
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Matt J. Culley. Provided by National Agricultural Library. United States, Arizona.
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W.F. Hill. Provided by National Agricultural Library. United States, Florida, Marion Co., Lake Kerr.
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Clark Miles. Provided by National Agricultural Library. United States, Wyoming, Wyoming National Forest.
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W.H. Shaffer. Provided by National Agricultural Library. United States, New Mexico, Gila National Forest.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Carole Ritchie. Provided by ARS Systematic Botany and Mycology Laboratory. Saint Kitts and Nevis, Saint Kitts.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. France, Saint Martin.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. United Kingdom, Montserrat.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection.
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Clarence A. Rechenthin. Provided by USDA NRCS East Texas PMC (ETPMC).
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. Italy, Catania.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Clarence A. Rechenthin. Provided by USDA NRCS East Texas PMC (ETPMC). United States, Texas, Reeves Co., Pecos vicinity, N. of town.
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Patrick J. Alexander.
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Patrick J. Alexander.
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Patrick J. Alexander.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection.
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D.F. Costello. Provided by National Agricultural Library. United States, Colorado.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Provided by USDI Bureau of Land Management (BLM). United States, Utah.