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  1. By: Matthews, J F - Ketron, Donna W. - Zane, Sandra F.
    Type: Article
    In: Rhodora
    Volume: 95
    Date: 1993
    Page Range: 166--183
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Matthews, James F - Ketron, Donna W. - Zane, Sandra F.
    Type: Article
    In: SIDA, contributions to botany
    Volume: 15
    Date: 1992
    Page Range: 71--89
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-