EEVIEW ON DEPENDENT PLANTS 89 



REVIEW. What is an independent plant? Dependent? Give 

 examples. How are dependent plants distinguished from others in 

 looks? Define parasite. Saprophyte. Give examples. What is a 

 host? How does a parasitic fungus live on its host? What are 

 hyphse? What is mycelium? What are root-parasites? Give 

 examples. What is a mycorrhiza? What is the relation of the soil 

 fungus to its host? What is the role or office of saprophytes in 

 nature? Are parasites ever green? Explain. What has probably 

 been the evolution of most parasites and saprophytes? What is an 

 epiphyte? Give examples. How do they live? Why may they 

 have become epiphytes? 



NOTE. Usually, the most available parasite is the dodder. It 

 is common in swales from July until autumn, winding its coral- 

 yellow stems about herbs and soft -growing bushes. It is a degraded 

 member of the morning-glory family. It produces true flowers and 

 seeds. These seeds germinate the following spring. The slender 

 young vine grows from the ground for a time, but if it fails to find a 

 host, it perishes. 



The cultivated mushroom, a saprophytic plant. 



