Joseph Ewan

1909 – 1999

• A review of Purdieanthus and Lehmanniella, two endemic Colombian genera of Gemtianaceae, and Biographical notes on Purdie and Lehmann
• A Review of Purdieanthus and Lehmanniella, Two Endemic Colombian Genera of Gentianaceae, and Biographical Notes on Purdie and Lehmann
• A review of the genus Githopsis
• A review of the neotropical lisianthoid genus Lagenanthus (Gentianaceae)
• A Review of the North American Weedy Heliotropes
• A synopsis of the North American species of Delphinium
• An introductory bibliography to the botany of South America and adjacent islands
• An undescribed Delphinium from the Cordillera Oriental of Mexico
• Analytical index to Darlington's Memorials of Bartram and Marshall (1849)
• Andrew Alverson (1845-1916) of California and his cactus catalogue
• Annotations on west American Ferns
• Arthur Robert Steele