Wallis, Charles S.

• Oklahoma Native Plant Record Vol. 7 No. 1 (2007): Oklahoma Native Plant Record - Articles
  Vascular Plants of the Oklahoma Ozarks
  Abstract  PDF
• Proceedings of the Oklahoma Academy of Science Vol 34 (1953) - Biological Sciences
  Additions to the Oklahoma Flora from Cherokee County
  Details  PDF
• Proceedings of the Oklahoma Academy of Science Vol 38 (1957) - Biological Sciences
  Additions to the Oklahoma Flora from the Oklahoma Ozarks
  Details  PDF
• Proceedings of the Oklahoma Academy of Science Vol 43 (1963) - Biological Sciences
  Additions to the Oklahoma Flora from the Oklahoma Ozarks. Studies in the Composition and Distribution of the Oklahoma Flora--No. 27
  Details  PDF