276 THE BEAN FAMILY. 



QUESTIONS ON CHAPTER XL 



1. Describe the leaf of a Sweet Pea, with a careful sketch. Why is 

 the stem of the Sweet Pea " winged " ? 



2. Describe the appearance of (1) a young Sweet Pea tendril before 

 it has met with a support, (2) a tendril which has just caught a support, 

 (3) the same at a later stage, (4) an old tendril which has not grasped 

 any support. 



3. Describe, from your own observations and experiments, how a 

 tendril acts. 



4. Describe the vegetative parts (shoot and root) of the Everlasting 

 Pea, and compare it throughout with the ordinary Sweet Pea. 



5. Describe, with sketches, the flower of a Sweet Pea and its method 

 of pollination. 



6. Describe a common Vetch ( Vicia) and compare it (as to shoot, 

 leaves, flowers) with Sweet Pea and with Broad Bean. 



7. Why is the Broad Bean placed with the Vetch ( Vicia) genus, and 

 not with other " Beans," e.g. French Bean or Scarlet Runner? 



8. Describe the mode of growth of White Clover and compare it 

 with that of Red Clover, pointing out how the vegetative organs of each 

 adapt it to its surroundings. 



9. Describe the sleep-movements of a Clover leaf as they occur in 

 nature, and explain their causes and their utility. Give an account of 

 experiments you have yourself made on these movements. 



10. Compare the habit, habitat, leaf-structure, and leaf -movements 

 of Clover and Wood Sorrel. 



11. Describe and compare the flowers of Red Clover and White 

 Clover, pointing out any differences in structure and mode of pollina- 

 tion. 



12. Describe the way in which the Scarlet Runner climbs, and com- 

 pare its climbing with that of Sweet Pea or Garden Pea. 



13. Can you explain why a Scarlet Runner can only climb vertical 

 or inclined supports, while a Sweet Pea can climb round even hori- 

 zontal supports? 



14. Describe the flower-structure and pollination-mechanism of a 

 Scarlet Runner, with sketches. 



15. How can you cause a Sweet Pea plant, or a cut branch, to go on 

 flowering for a longer time than it would if left alone? 



