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  1. Juncus mertensianus and its austrolimital segregate, J. Duranii
    By: Ewan, J
    Type: Article
    In: Rhodora
    Volume: 47
    Date: 1945
    Page Range: 185--191
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  2. New records of neotropical Gentianaceae
    By: Ewan, J
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 63
    Date: 1950
    Page Range: 163--165
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  3. New records of neotropical Gentianaceae~III
    By: Ewan, J
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 65
    Date: 1952
    Page Range: 189--192
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  4. New records of neotropical Gentianaceae-II
    By: Ewan, J
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 64
    Date: 1951
    Page Range: 131--134
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  5. A review of the genus Githopsis
    By: Ewan, J
    Type: Article
    In: Rhodora
    Volume: 41
    Date: 1939
    Page Range: 302--313
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  6. Taxonomic history of perennial southwestern Datura metelloides
    By: Ewan, J
    Type: Article
    In: Rhodora
    Volume: 46
    Date: 1944
    Page Range: 317--323
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