CONTENTS 



INTRODUCTION 4 



ACKNOWLEDGEMENTS 4 



PREVIOUS RESEARCH 4 



STUDY AREA 6 



Physiography 6 



Climate 7 



METHODS 7 



Data Collection 7 



Data Analysis 9 



Taxonomic Considerations 12 



RESULTS AND DISCUSSION 13 



Community Type Classification 13 



Vegetation-Environmental Relationships 13 



CONCLUSIONS 2 5 



LITERATURE CITED 2 6 



APPENDIX A, Plant List and Importance Values of All Species 



Identified in Study 30 



APPENDIX B. List and Keys to Plant Communities of North- 

 eastern Montana 37 



APPENDIX C. Average Cover and Constancy for Community Types, 49 



APPENDIX D. Vegetation Characteristics for Each Plot .... 74 



APPENDIX E. Site Characteristics for Each Plot 100 



APPENDIX F. Species Richness and Diversity Measures for 



Each Plot 125 



APPENDIX G. Example Community Type Description 13 8 



APPENDIX H. Detrended Canonical Correspondence Analysis 



Diagrams 140 



