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Revisions of the genera Acanthospermum, Flourensia, Oyedaea, and Tithonia
Blake, S. F.
Date:
1921
Citation:
Blake, S. F. 1921. "Revisions of the genera Acanthospermum, Flourensia, Oyedaea, and Tithonia." Contributions from the United States National Herbarium. 20 (10):383–436.