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  1. By: Blackwell, Will H., - Letcher, P M - Powell, Martha J - Vélez, Carlos G.
    Type: Article
    In: Phytologia
    Volume: 93
    Issue: 3
    Date: 2011
    Page Range: 304--315
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  2. By: Blackwell, Will H., - Powell, Martha J
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 68
    Date: 1981
    Page Range: 524--526
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  3. By: Blackwell, Will H., - Letcher, Peter M - Powell, Martha J
    Type: Article
    In: Phytologia
    Volume: 98
    Issue: 2
    Date: 2016
    Page Range: 128--136
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  4. By: Blackwell, Will H., - Letcher, Peter M - Powell, Martha J
    Type: Article
    In: Phytologia
    Volume: 99
    Issue: 1
    Date: 2017
    Page Range: 74--82
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  5. By: Davis, William J. - Letcher, Peter M - Powell, Martha J
    Type: Article
    In: Phytologia
    Volume: 98
    Issue: 4
    Date: 2016
    Page Range: 241--249
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke