APPENDIX II 



SUMMARY OF BRITISH PLANT FORMATIONS 

 AND ASSOCIATIONS 



I. The Plant Formation of Fresh Waters. 



A. The Sub-formation of Foul Waters. 



B. The Sub-formation of nearly Stagnant Waters {i.e., with no 



flood-currents). 



1. Associations of Submerged Plants {e.g., Chareta). 



2. Associations of Plants with Floating Leaves {e.g., Lemneta). 

 23. Associations of Reed Swamps {e.g., Phragmitidetum vulgaris). 



C. The Sub-formation of Slowly-moving Water (with j)eriodical 



flood-currents and rich in dissolved mineral salts). 

 21. Associations of Submerged Plants {e.g., Ranunculetum 



circinati). 

 2 2. Associations of Reed Swamps {e.g., Glycerietum aquaticae). 



D. The Sub-formation of lake-margins, with well-aerated waters. 



E. The Sub-formation of Quickly-flowing Streams of hill and 



mountain slopes. 

 ^ 1. Associations of Streams with Calcareous Waters. 

 * 2. Associations of Streams with Non-calcareous Waters. 



F. The Sub-formation of Stagnant and Acidic Waters. 



II. The Plant Formation of Salt and Brackish Waters. 



1. Associations of Sea- weeds {e.g., Laminarietum digitatae). 



2. Associations of submerged Marine Flowering Plants {e.g., 



Zosteretum marinae). 



3. Associations of Marine and Tidal Reed Swamps {e.g., 



Spartineta). 



4. Associations of Brackish Waters {e.g., Ranunculetum bau- 



dotii). 



5. Associations of Brackish Reed Swamps {e.g., Scirpetum 



maritimi). 



' Well represented in the Peak District. 



^ Fairly well represented in the Peak Dietrict. 



