Correspondence, notes, unprinted essays (including a biography of R.M. Horner), and field notebooks relating to the collection of botanical specimens for the Washington State University Ownbey Herbarium and for general distribution. Among the approximately fifty collectors represented are E.R. Bogusch, Lincoln Constance, J.S. Cotton, Arthur Cronquist, Henry Darlington, W.W. Eggleston, Thomas Howell, and Frank Kreager.
18 ft. Summary Correspondence, research notes and drafts relative to taxonomic and genetic research, especially of the genera Allium, Calochortus and Tragopogon. A large portion of the papers are concerned with Ownbey's observations of the genetic behavior of the species of Tragopogon, and his discovery of the apparent evolution of new species under natural conditions through the mechanism of chromosomal doubling. Significant correspondents include: Edgar Anderson, Lincoln Constance, Arthur Cronquist, Charles Heisen, C. Leo Hitchcock, Phillip Munz, Gerald Ownbey, and G. Ledyard Stebbins, Jr.