CONTENTS 



CHAPTER I 



INTRODUCTION 



General description of the Peak District. Types of scenery. Rocks and 

 soils. Soils and their characteristic plants. Flora and vegetation. 

 Vegetation maps. Plant communities. Vegetation maps and floristic 

 maps. The value of vegetation maps. Rainfall. Smoke. Tempera- 

 ture. The upper atmosphere ; temperatures ; direction of the wind ; 

 velocity of the wind ; humidity of the atmosphere. Note on the use 

 of the words "acidic" and "basic." pp. 1-37 



CHAPTER II 



WOODLAND ASSOCIATIONS 



Distribution of the woods. Woodland associations of Great Britain. 

 Woodland associations of the southern Pennines. Factors related to 

 the distribution of the woodland associations. Oak woods of Quercus 

 Rohur. Transitional woods of Quercus Robur and Q. sessilijlora. 

 Oak woods of Quercus sessilijlora ; trees and shrubs ; variation of 

 vegetation in the oak woods ; influence of shade on the ground vege- 

 tation. Alder-willow thickets. Birch woods of Betula pubescens ; the 

 primitive birch-forest. Ash woods of Fraxinus excelsior ; semi-natural 

 woods and plantations on the limestone slopes ; trees and shrubs ; 

 herbaceous vegetation. Comparison of the woodland plants of the 

 southern Pennines. pp. 38-87 



CHAPTER III 



SCRUB ASSOCIATIONS 



Past and present upper altitudinal limit of trees. Buried timber in the 

 peat. Degeneration of woodland. Distribution of character of the 

 existing scrub. Scrub in other districts. Relation of the ground 

 vegetation of woodland to retrogi-essive scrub. Progressive and 

 retrogressive scrub. Comparison of the types of retrogressive scrub. 



pp. 88-102 



