, University of Oklahoma and the Oklahoma Native Plant Society, United States

• Oklahoma Native Plant Record Vol. 15 No. 1 (2015): Oklahoma Native Plant Record - Articles
  Preface to First Flowering Dates
  Abstract  PDF
• Oklahoma Native Plant Record Vol. 15 No. 1 (2015): Oklahoma Native Plant Record - Articles
  Contributions to the Flora of Cimarron County and the Black Mesa Area
  Abstract  PDF