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  1. By: Robson, Diana Bizecki - Wiersema, John Harry - Hellquist, C Barre - Borsch, Thomas
    Type: Article
    In: The Canadian field-naturalist
    Volume: 130
    Issue: 1
    Date: 2016-01-01
    Page Range: 25--31
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Hellquist, C Eric - Hellquist, C Barre - Whipple, Jennifer J
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 61
    Date: 2014
    Page Range: 159--176
    Publication Info: Berkeley, California Botanical Society,
  3. By: Hellquist, C Barre
    Type: Article
    In: Rhodora
    Volume: 86
    Date: 1984
    Page Range: 101--111
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  4. By: Colt, LeBaron C., - Hellquist, C Barre
    Type: Article
    In: Rhodora
    Volume: 73
    Date: 1971
    Page Range: 56--57
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  5. By: Hellquist, C Barre
    Type: Article
    In: Rhodora
    Volume: 76
    Date: 1974
    Page Range: 19--19
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],