CLIMBERS 



117 



pupil 



REVIEW. How do 

 plants climb? Explain 

 what is meant by 

 scramblers. By root- 

 climbers. What is a 

 tendril? How does it 

 find a support? How 

 does it coil? How does 

 it grasp its support? 

 What is the morphol- 

 ogy of the tendril of 

 Virginia creeper? Of 

 the pea? Of the clem- 

 atis? What is a 

 twiner? How does it 

 find a support? What 

 is an antitropic twiner? 

 Eutropic? 



NOTE. The 

 may not un- 

 derstand why 

 the branch (as 

 tendril and 

 flower-cluster ) 

 stands oppo-^ 



site the bud in the grape and Virginia creeper. Note that a 



grape-shoot ends in a tendril (a, Fig. 180). The tendril 



represents the true axis of the shoot. On the side a leaf 



borne, from the axil of which the branch grows to continue 



the shoot. This branch ends in a tendril, b. 



Another leaf has a branch in its axil, and this 



branch ends in the tendril c. The real apex of the 



shoot is successively turned aside until it appears 



to be lateral. That is, the morphologically terminal 



points of the successive shoots are the tendrils, and 



the order of their appearing is a, 6, c. The tendrils 



branch: observe the minute scale representing a 



leaf at the base of each branch. This type of branch- 

 ing the axial growth being continued by successive 



lateral buds is sympodial, and the branch is a 



sympode. Continuous growth from the terminal bud 



is monopodial, and the branch is a monopode. 



179. Antitropic and eutropic twiners. False 

 bitter-sweet and hop. 



180. Sympode 

 of the grape. 



