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  • Dicotyledonae
  • Ridgway, R.
  • Illinois
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  • Illinois
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  • 1900s
  • NMNH - Botany Dept.
  • Dicotyledonae
  • Dicotyledonae
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  • Gentianales
  • Apocynaceae
  • Apocynaceae
  • Asclepias purpurascens L.
  • Asclepias purpurascens L.