THE HIGHER DICOTYLEDONS. 381 



38. Describe, from your own work, the adaptations of the flowers 

 of Dandelion for cross -pollination by insects. Is there any provision 

 for self-pollination? If so, explain the mechanism, with a series of 

 sketches (from the actual plant). 



39. Describe the way in which a Daisy spreads over a lawn. Com- 

 pare it in this respect with the Dandelion. How many young plants 

 have you observed in course of formation by the parent plant ? Why 

 do you suppose the Daisy resorts to this method of spreading apart 

 from seeds ? 



40. Compare the flower-heads and flowers of Daisy with those of 

 Dandelion. Which plant seems, from your own observations, to pro- 

 pagate itself most freely by seed ? 



41. In how far may a Daisy flower-head be compared with a flower? 



42. In what sort of locality, and in what sort of soil, have you seen 

 Coltsfoot growing ? How does Coltsfoot spread (apart from seeds) and 

 what makes it a tiresome weed in fields ? 



43. Describe carefully the appearances presented by a Coltsfoot 

 plant month by month throughout the year : that is, give a brief 

 "diary" of its year's life, noting such points as the time when the 

 flower-head is first formed, when it emerges from the soil, when it 

 opens, how long it remains open, when it closes again, when it re- 

 opens to let the fruits escape, when the leaves emerge, how they 

 expand, etc. 



44. Describe fully the flower -head and flowers of Coltsfoot, and com- 

 pare the pollination arrangements with those seen in Dandelion and 

 Daisy. 



45. Why are the Composites called "an aggressive and successful 

 family " ? 



46. Write an account of the "division of labour" seen in the flower- 

 heads of Daisy and Coltsfoot. 



