Oklahoma Native Plant Record, Volume 12, Number 1, December 2012 1 Oklahoma Native Plant Record Journal of the Oklahoma Native Plant Society 2435 South Peoria Tulsa, Oklahoma 74114 Volume 12, December 2012 ISSN 1536-7738 http://ojs.library.okstate.edu/osu/ Managing Editor: Sheila Strawn Production Editor: Paula Shryock Electronic Production Editor: Sandy Graue Technical Advisor: Bruce Hoagland The purpose of ONPS is to encourage the study, protection, propagation, appreciation and use of the native plants of Oklahoma. Membership in ONPS is open to any person who supports the aims of the Society. ONPS offers individual, student, family, and life memberships. 2012 Officers and Board Members President: Adam Ryburn Vice-President: Lynn Michael Secretary: Sandy Graue Treasurer: Mary Korthase Membership Coordinator: Tina Julich Historian: Jeanie Coley Past President: Lynn Michael Board Members: Brooke Bonner Elaine Lynch Buddy Miller Clare Miller Janette Steets Jay Walker Central Chapter Chair: Joe Roberts Cross-Timbers Chapter Chair: Ron Tyrl Mycology Chapter Chair: Steve Marek Northeast Chapter Chair: Alicia Nelson Color Oklahoma Chair: Pearl Garrison Conservation Chair: Chadwick Cox Gaillardia Editor: Chadwick Cox Website Manager: Adam Ryburn http://www.oknativeplants.org Harriet Barclay Award Chair: Rahmona Thompson Anne Long Award Chair: Gloria Caddell ONPS Service Award Chair: Sue Amstutz Photography Contest Chair: Kim Shannon Librarian: Karen Haworth Mailings Chair: Karen Haworth Publicity Chair: Alicia Nelson Cover photo: Erythronium sp. (Dogtooth lily) by Lynn Michael, past president of ONPS . Articles (c) The Authors Journal compilation (c) Oklahoma Native Plant Society Except where otherwise noted, this work is licensed under a Creative Commons Attribution- NonCommercial-ShareAlike4.0 International License, https://creativecommons.org/licenses/ by-nc-sa/4.0/, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly attributed, not used for commercial purposes, and, if transformed, the resulting work is redistributed under the same or similar license to this one. https://doi.org/10.22488/okstate.17.100087 http://ojs.library.okstate.edu/osu/ http://www.oknativeplants.org/ Oklahoma Native Plant Record Volume 12, December 2012 2 Oklahoma Native Plant Record Volume 12 Table of Contents Foreword ................................................................................................................................................. 3 Possible Mechanisms of the Exclusion of Johnson Grass by Tall Grass Prairies M. S. thesis ................................................................................................................................ 4 Dr. Marilyn A. Semtner A Preliminary Pawnee Ethnobotany Checklist .............................................................................. 33 Mr. C. Randy Ledford Vascular Flora of Alabaster Caverns State Park, Cimarron Gypsum Hills, Woodward County, Oklahoma .......................................................................................... 43 Dr. Gloria M. Caddell and Ms. Kristi D. Rice A Comparison of the Composition and Structure of Two Oak Forests in Marshall and Pottawatomie Counties ................................................................................. 63 Dr. Bruce Smith Critic’s Choice Essay: Virtual Herbaria Come of Age ....................................................................... 69 Dr. Wayne Elisens Editorial Policies and Procedures ..................................................................................................... 72 Five Year Index to Oklahoma Native Plant Record ........................................... inside back cover Oklahoma Native Plant Record, Journal of the Oklahoma Native Plant Society, Volume 12, December 2012 Title Page Table of Contents Foreword