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W.S. McGiness. Provided by National Agricultural Library. United States, Arizona, Tonto National Forest.
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F.G. Plummer. Provided by National Agricultural Library. United States, New Mexico, Lincoln National Forest.
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Suzanne Foster. Provided by USDA Forest Service.
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory.
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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).
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Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, Montana.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Patrick J. Alexander.
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Clarence A. Rechenthin. Provided by USDA NRCS East Texas PMC (ETPMC).
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Tracey Slotta. Provided by ARS Systematic Botany and Mycology Laboratory. United States, Texas, Bexar Co., San Antonio.
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Clarence A. Rechenthin. Provided by USDA NRCS East Texas PMC (ETPMC).
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Paul S. Bieler. Provided by National Agricultural Library. United States, Nevada.
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E.O. Wooten. Provided by National Agricultural Library. United States, Arizona.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. South Africa, East London.
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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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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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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. Venezuela, Caracas.
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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. United Kingdom, Montserrat.
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Britton, N.L., and A. Brown. Provided by Kentucky Native Plant Society.
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Howard, R.A. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. United States, Massachusetts, Middlesex Co., Acton.