Vascular Plants

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Engelmann, G. (1857), Synopsis of the Cactaceae of the territory of the United States and adjacent regions. Proceedings of the American Academy of Arts and Sciences 3 : 259-346 (Paper) Engelmann, G. Author
Names in this reference:
  1. Opuntia arbuscula Engelm.
  2. Opuntia davisii Engelm. & J.M.Bigelow
  3. Opuntia erinacea Engelm. & J.M.Bigelow
  4. Opuntia mamillata A.Schott ex Engelm.
  5. Opuntia rufida Engelm.
  6. Opuntia sphaerocarpa Engelm. & J.M.Bigelow
  7. Opuntia subg. Cylindropuntia Engelm.
  8. Opuntia tenuispina Engelm.
  9. Opuntia whipplei var. spinosior Engelm. & J.M.Bigelow

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