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  1. Cover Image

    Ancient versus modern distribution of cultivated plants. by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  2. Cover Image

    Two new perseas from Central America. by Williams, Louis O.

    Published 2015
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    Artículo
  3. Cover Image

    Plantas nuevas. by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  4. Cover Image

    Plantas nuevas, Aeschynomene pineticola. by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  5. Cover Image

    New and noteworthy orchids from Mexico and Central America by Williams, Louis O.

    Published 2015
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    Artículo
  6. Cover Image

    Plantae Centrall-Americanae, II. by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  7. Cover Image

    The Orchidaceae de Mexico by Williams, Louis O.

    Published 2015
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    Artículo
  8. Cover Image

    Distribution of Mexican orchids by Williams, Louis O.

    Published 2015
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    Artículo
  9. Cover Image

    Especies de orquídeas en Mexico by Williams, Louis O.

    Published 2015
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  10. Cover Image

    The Orchidaceae de Mexico by Williams, Louis O.

    Published 2015
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  11. Cover Image

    The Orchidaceae de Mexico by Williams, Louis O.

    Published 2015
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    Artículo
  12. Cover Image

    Key to the sections and species of epidendrum. by Williams, Louis O.

    Published 2015
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  13. Cover Image

    Key to the sections and species of epidendrum. by Williams, Louis O.

    Published 2015
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    Artículo
  14. Cover Image

    Beanz, maize and civilization by Williams, Louis O.

    Published 2015
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  15. Cover Image

    Plantae Centrall-Americanae, IV. by Williams, Louis O., Standley, Paul C.

    Published 2015
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    Artículo
  16. Cover Image

    Pentaplaris, a new genus of tiliaceae from Costa Rica. by Williams, Louis O., Standley, Paul C.

    Published 2015
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  17. Cover Image

    Encyclia, a segregate from epidendrum? by Williams, Louis O.

    Published 2015
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  18. Cover Image

    Ocho géneros de árboles y arbustos nuevos para Centro América. by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  19. Cover Image

    Plantae Centrali-Americanae, III by Standley, Paul C., Williams, Louis O.

    Published 2015
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    Artículo
  20. Cover Image

    A new Mexican adontoglossum by Williams, Louis O.

    Published 2015
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