Dutch crocus (Crocus vernus): four diagrams of a whole and sectioned flowering plant. Partially coloured lithograph by W. G. Smith, c. 1863, after himself.

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Dutch crocus (Crocus vernus): four diagrams of a whole and sectioned flowering plant. Partially coloured lithograph by W. G. Smith, c. 1863, after himself. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.