CANOTIA VOLUME 14

Four Students remember their Mentor Dr. Donald J. Pinkava

David J. Keil, Wendy Hodgson, Marc Baker, and Dixie Z. Damrel ...... 1

Vascular of : Alismataceae

Jon M. Ricketson ...... 10

Vascular Plants of Arizona: Hydrocharitaceae

Jon M. Ricketson ...... 23

Vascular Plants of Arizona: Najadaceae

Jon M. Ricketson ...... 31

Vascular Plants of Arizona: Resedaceae

Raul Gutierrez ...... 36

Vascular Plants of Arizona: Ruppiaceae

Jon M. Ricketson ...... 39

Vascular Plants of Arizona: Srophulariaceae

Rich Crawford, Kate Noonan, and Tina Ayers ...... 42

Vascular Plants of Arizona: Solanaceae Part Six: Nicotiana

Elizabeth Makings and Jean-Philippe Solves ...... 54

Vascular Plants of Arizona: Zannichelliaceae

Jon M. Ricketson ...... 63

Analysis of infraspecific taxa within Cylindropuntia acanthocarpa using multivariate analysis of morphological characters

Marc Baker, Donald J. Pinkava, and Michelle A. Cloud-Hughes ...... 66

November 2018 Vascular Herbarium School of Life Sciences Arizona State University CANOTIA

Editor: Leslie R. Landrum ([email protected])

Production Editors: Shannon C. Doan and Leslie R. Landrum ([email protected]; [email protected])

Webmaster: Edward Gilbert ([email protected])

P. O. Box 874501 School of Life Sciences Arizona State University Tempe, AZ 85287-4501

Printed copies of this issue are being made possible through a grant from the Arizona Native Plant Society. An introduction to the Vascular Plants of Arizona project can be found in Canotia volume 1, issue 1.

Canotia publishes botanical and mycological papers related to Arizona. These may include contributions to the Vascular Plants of Arizona project, checklists, local floras, new records for Arizona and ecological studies. All manuscripts are peer-reviewed by specialists. Acceptance for publication will be at the discretion of the editor. At least 30 printed copies of each issue are distributed to libraries in the United States, Europe, and Latin America. Anyone may download copies free of charge at http://www.canotia.org.

Canotia is named for Canotia holacantha Torr. (), a spiny or small nearly endemic to Arizona.

ISSN 1931-3616