Estes, James R., Robert Bebb Herbarium University of Oklahoma Norman, Oklahoma University of Nebraska State Museum Lincoln, Nebraska, United States

• Oklahoma Native Plant Record Vol. 18 No. 1 (2018): Oklahoma Native Plant Record - Articles
  Anther Number, Anther Apical Appendages, and Pollination Biology of Calyptocarpus vialis Lessing (Heliantheae: Asteraceae)
  Abstract  PDF