183* 



can survive under similar conditions ; (3) what tliese conditions are, — 

 whether, sun, shade, dry soil, wet soil, sand, clay, rock ; (i) what par- 

 ticular plant is must abundant or gives character to the society. 



99. — Two plant societies, — tlte close-bittoi sward and the rushy pond. 



Study one society thoroughly. Make lists of the kinds of plants 

 and of the relative numbers of each. If the names of the plants 



100. — 2^ lie edge of the road. Trees and bushes croiod the drvoe-imy, and a rib- 

 bon of grass and weeds has pushed itself toihe very margin. 



are not known, call them by numbers ; make dried specimens of 

 them for reference. When another society is visited, repeat these 

 observations, and compare one society with another. 

 Ash every ^j>Za?ii!^ why it grows there. 



283 



