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  1. By: Gregg, Josiah,
    Publication info: New York, H. G. Langley, 1844
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Herbarium
  2. By: Gregg, Josiah,
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
  3. By: Gregg, Josiah,
    Publication info: 1847-1849
    Holding Institution: Harvard University Botany Libraries
    BHL Collections: BHL Field Notes Project