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  1. By: Knieskern, Peter D.,
    Publication info: [Albany, s.n.], 1842
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  2. By: Knieskern, Peter D.,
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
  3. By: Knieskern, Peter D.,
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: John Torrey Papers