Ray J. Dayis

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. 1963. The morphology of the inflorescence of ragweeds (Ambrosia-Franseria: Compositae). Am. Jour. Bot. 50: 872-880. 1964. A re-evaluation of the genus Ambrosia (Compositae). Jour. Arnold Arb. 45: 401-438. Payne, W. W., Raven, P. H., & Kyhos, D.W. 1964. Chromosome numbers in Compesitae. IV. Ambrosieae. Am. Jour. Bot. 51: 419-424. Turr~ert B. L. & Irwin,(More)
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