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  1. By: Humphrey, J E
    Type: Article
    In: Annals of botany
    Volume: 8
    Date: 1894-09
    Page Range: 373--376
    Publication Info: London, Academic Press [etc.],
  2. By: Humphrey, J E
    Type: Article
    In: Botanical gazette
    Volume: 20
    Issue: 5
    Date: 1895
    Page Range: 222--228
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  3. By: Humphrey, J E
    Type: Article
    In: Botanical gazette
    Volume: 23
    Issue: 1
    Date: 1897
    Page Range: 50--51
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991