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 (¢.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). 
©. The Sub-formation of Slowly-moving Water (with periodical 
flood-currents and rich in dissolved mineral salts). 
21. Associations of Submerged Plants (e.g., Ranunculetum 
circinati). 
29. Associations of Reed Swamps (e.g., Glyceriétum aquaticae). 
D. The Sub-formation of lake-margins, with well-aérated waters. 
E. The Sub-formation of Quickly-flowing Streams of hill and 
mountain slopes. 
11, Associations of Streams with Calcareous Waters. 
19, 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., Laminariétum digitatae). 
2. Associations of submerged Marine Flowering Plants (e.g., 
Zosteretum marinae). 
3. Associations of Marine and Tidal Reed Swamps (eg., 
Spartineta). 
4, Associations of Brackish Waters (e.g., Ranunculetum bau- 
dotii). 
5. Associations of Brackish Reed Swamps (eg., Scirpetum 
maritimi). 
1 Well represented in the Peak District. 
2 Fairly well represented in the Peak District. 
