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CONTENTS.
VII
IV. Climax formations of Western North America-Continued.
The Short-Grass Plains
Bulbilis-Bouteloua Association
- Nature 139
- Range 140
- Grouping of dominants 141
- Factor relations 142
- Sequence of dominants 142
Societies
- Prevernal societies 143
- Vernal societies 143
- Estival societies 143
- Serotinal societies 144
Clans
- Prevernal clans 144
- Vernal clans 144
- Estival clans 144
- Serotinal clans 144
The Desert Plains
Aristida-Bouteloua Association
- Nature 144
- Range 145
- Rank of dominants 146
- Grouping of dominants 146
- Sequence of dominants 147
Societies
- Vernal societies 148
- Estival societies 148
- Serotinal societies 149
Clans
The Bunch-Grass Prairie
Agropyrum-Stipa Association
- Nature 149
- Range 149
- Factor relations and sequence 151
Societies
- Prevernal societies 152
- Vernal societies 152
- Estival societies 152
- Serotinal societies 152
Clans
- Prevernal clans 152
- Vernal clans 152
- Estival clans 152
- Serotinal clans 152
The Sagebrush Climax
Atriplex-Artemisia Formation
- Nature 152
- Unity of the formation 153
- Range 154
- Subclimax sagebrush 155
- Associations 156
The Basin Sagebrush
Atriplex-Artemisia Association
- Range 156
- Rank and grouping 157
- Correlations 158
- Successional sequence 159
Societies
- Grass communities appearing as societies 160
- Vernal societies 160
- Estival societies 160
- Serotinal societies 160
The Coastal Sagebrush
Salvia-Artemisia Association
- Range 160
The Desert Scrub Climax
Larrea-Prosopis Formation
- Nature 162
- Range 163
- Unity of the formation 163
- Structure of the formation 165
Summary of Dominants
- Associations 166
- Relation to other formations 167
The Eastern Desert Scrub
Larrea-Flourensia Association
- Correlations and sequence 168
Societies
The Western Desert Scrub
Larrea-Franseria Association
- Nature 170
- Extent 171
- Structure 172
- Groupings 172
- Factor relations 173
- Successional relations 174
- Root relations 176
Societies and Clans
The Chaparrel Climax
Quercus-Ceanothus Formation
- Nature 177
- Unity of the chaparral formation 178
- Climatic relations 178
- Origin and succession 179
- Range and extent 180
- Structure of the formation 181
- Grouping of dominants 181
- Associations 183
The Petran Chaparral
Cercocarpus-Quercus Assoeiaiion
- Nature and extent 183
- Contacts 184
- Groupings 185
- Equivalence of dominants 186
