Sawyer and Keeler-Wolf classification system

The Sawyer and Keeler-Wolf classification system is an evolving system of classification of vegetation types, plant communities, or floristic characterization.[1]: 114, 138–9 [2][3][4][5] It was first developed in 1995 by John O. Sawyer and Todd Keeler-Wolf for the California Native Plant Society, in the mission to classify all vegetation in California.[1]: 114  Particular attention was paid to recognizing rare types that were "lumped" into general categories in previous systems, such as the Munz and Keck classification system, Chetham and Haller classification system, and Holland classification system.[1]: 114  It uses constantly updated quantitative measurements of both species diversity and cover to define its types.[1]: 114  It intended to be evolving and to continue to be refined.[1]: 114 

References
  1. Introduction to California Plant Life, Robert Ornduff, Phyllis M. Faber, Todd Keeler-Wolf, California Natural History Guides No. 69, University of California Press, Ltd., 2003, ISBN 978-0-520-23704-9
  2. Santa Margartia River Recharge and Recovery Enhancement Program, United States Bureau of Reclamation,
  3. Biological Resources Report, Elder and Plunge Creek Project, San Bernardino County Department of Public Works Environmental Management Division,
  4. Placer County Natural Resources Report, Chapter 2: Methods, 2004
  5. Todd Keeler-Wolfe bio, California Native Plant Society
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