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Flora of Panama. Part IV. Fascicle I
Vol 37, Page 1, Date 1950
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The Grain Amaranths: A Survey of Their History and Classification
Vol 37, Page 561, Date 1950
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Flora of Panama. Part V. Fascicle II
Vol 37, Page 121, Date 1950
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The American Species of Triumfetta L
Vol 37, Page 315, Date 1950
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Miscellanea Taxonomica. I
Vol 37, Page 397, Date 1950
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Some American Carboniferous Fern Fructifications
Vol 37, Page 409, Date 1950
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The American Species of Sarcostemma R. Br. (Asclepiadaceae)
Vol 37, Page 477, Date 1950