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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mohlenbrock, R H - Evans, Dan K.,
    Type: Article
    In: Rhodora
    Volume: 74
    Date: 1972
    Page Range: 142--151
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Mohlenbrock, R H - Evans, Dan K.,
    Type: Article
    In: Rhodora
    Volume: 76
    Date: 1974
    Page Range: 460--470
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Ely, Joseph S - Evans, Dan K.,
    Type: Article
    In: Journal of the Botanical Research Institute of Texas
    Volume: 4
    Date: 2010
    Page Range: 411--433
    Publication Info: Fort Worth, Tex, Botanical Research Institute of Texas, 2007-