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  1. By: Macoun, W. T. (William Tyrrell), - Preston, Isabella,
    Publication info: Ottawa, s.n, 1912?
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)
  1. By: Preston, Isabella,
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 45
    Issue: 536
    Date: 1944-08
    Page Range: 169--174
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-