REVIEW ON CLIMBING PLANTS 



113 



107. Dextrorse and sinistrorse twiners. Pal 

 bitter-sweet and hop. 



eutropic (with the 

 sun). Fig. 167 shows 

 the two directions. 



Review. Why do 



plants climb .' I low do 

 they climb.' Explain 

 what is meant by scram- 

 blers. By root-climbers. 

 What is a tendril .' How 

 does it find a supporl .' 

 Why and how docs it 

 coil .' How docs it grasp 



its 8Upp01*1 .' What is t lie 

 morphology of the ten- 

 dril of Virginia creeper? 



Why.' Of the pea.' Of 

 the clematis.' What is 



a twiliel.' IIoW dues it 



find a support .' 

 What is ;i d< \- 

 trorse twiner.' 

 Sinistrorse .' 

 Note. The 



pupil may not 

 understand why the branch (.-is tendril and flower-cluster) 

 stands opposite the bud in the grape and Virginia creeper. 

 Note that ;i grape-shoot ends in a tendril (", Fig. 168), 

 The tendril represents the true axis of the shoot. <>n the 

 side a Leaf is borne, from the axil of which the 

 branch grows to continue the shoot. This branch 

 ends in a tendril, l>. Another leaf has a branch it 

 its axil, and tins branch ends in the tendril <. The 

 real apex of the Bhool is successively turned aside 

 until it appears to be lateral. That is, the morpho- 

 logically terminal points of t lie mi issive si 



the tendrils, and the order of Iheir app< aring is a, 

 l>, c Tic tendrils branch: observe the minute scale 

 representing a leaf at the base of each branch. 1 



type of branching the axial growth being itinued 



by successive lateral buds is sympodial, and the 

 branch is a ympode. Continuous growth from the 

 terminal bud is monopodia!, and the branch is a monopodt 



L68 Sympodi 



11 



