PLATE 



XLIV. 



LIST OF ILLUSTRATIONS 



Fig. 1. Rock Colonisation : A Bare Slab of" 

 Rock in a Forest showing a Primitive Soil 

 composed of Pine-needles . 



[Major Dixon, photo.] 



Fig. 2. The Lichen (Usnea) growing on the 

 branches of a Coniferous Tree 



[E.A.N.A.,photo.]j 



XLV. The Linnsea (Linncea borealis, Gronov.) . 



XLVI. J 



XLVII. 4 



Fig. 1. The Box-leaved Polygala (Pdygala? 

 chamcebuxw, Linn.) . . . . 



[E.A.N.A., photo.] 



Fig. 2. The Two-flowered Violet (Viola biftora, 

 Linn.). . . . , * 



[Major Dixon, photo.]J 



Fig. 1. The Flowers of the Martagon Lily 

 (Lilium martagon^ Linn.) . 



[E.A.N.A., photo.] 



Fig. 2. The May Lily (Maianthemum convert- 

 laria, Weber) '* 



[Major Dixon, photo.]- 1 



XXI 

 PAGE 



Face 238 



248 



252 



258 



FIGURES IN THE TEXT 



FIG. PAGE 



I. The Leaf and Scales of the Common Alpenrose (Rhodo- 

 dendron ferrugineum, Linn.) . . . .26 



1. Transverse section of a leaf, showing the scales on the 



lower surface. Magnified 14 times. 



2. Transverse section through a scale, on the right side of 



which a stoma is seen sheltered by the scale. 

 Magnified 190 times. 



3. Surface view of a scale. Magnified 190 times. 



II. Fruits of the Alpine Anemone (Anemone alpina, Linn.), in 

 various stages of development. Magnified twice 



1. In fully-opened flower. 2. Intermediate stage. 3. The 

 mature fruit. 



40 



