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The Phytogeography of Nebraska (1898; )
* (1905)
* (1907)
* (1916)
* (1920)
*The Phylogenetic Method in Taxonomy: The North American Species of Artemisia, Chrysothamnus, and Atriplex (1923, with Harvey Monroe Hall)
* (1928, reprinted 1973)
* Flower Families and Ancestors (1928, with Edith Clements)
* Plant Competition. An Analysis of Community Functions (1929, with J.E. Weaver & H.C. Hanson. Washington: Carnegie Institution

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