Blue Gentian (plate XXXIV), from American Medical Botany by Jacob Bigelow (1786–1879). Published by Cummings and Hilliard, Boston, 1817-20

Blue Gentian (plate XXXIV), from American Medical Botany by Jacob Bigelow (1786–1879). Published by Cummings and Hilliard, Boston, 1817-20

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