LIST OF ILLUSTRATIONS xxi 



Plate Page 



Fig. 1. Rock Colonisation : A Bare Slab of 

 Bock in a Forest showing a Primitive Soil 

 composed of Pine-needles . 



XT .TV. •! [Major Dixon, pUto.] . p^^ £38 



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

 branches of a Coniferous Tree 



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



XLV. The Linnaea {Lirmcea borecUis, Gronov.) 



XLVI. 



XLVII. 



'Fig. 1. The Box-leaved Polygala (Polygala 

 chamcehuxvs, Linn.) .... 



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



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

 Linn.). ..... 



[Major Dixon, photo. ]^ 



Fig. 1. The Flowers of the Martagon Lily "I 

 {lAlivm martagon, Linn.) . 



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



Fig. 2. The May Lily {Maiamthemvm corwal- 

 laria, Weber) 



[Major Dixon, photo.]-' 



248 



252 



258 



FIGURES IN THE TEXT 



Fio. Page 



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



dendronferrugineum, 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 . 40 



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

 mature fruit. 



