SHOOTS 



Fig. 53. Woodbine , >;.>) in a deciduous forest. Thf tne trunks are almost 



covered by the dense masses of woodbine, whose leaves are adjusted so as to form 

 compact mosaics, A lower stratum of vegetation is visible, composed of shrubs 

 and tall herbs, showing that the forest is somewhat open. 



tudes or latitudes the subter- 

 ranean and prostrate types of 

 foliage-bearing stems are most 

 common ; and as one passes to 

 lower altitudes or latitudes the 

 erect stems become more nu- 

 merous and more lofty. Among 

 stems of the erect type the tree 

 is the most impressive, and it 

 has developed into a great vari- 

 ety of forms or ^'Miabits/^ Any 

 one recognizes tlie great differ- 

 ence in tlie habits of the pine 

 and the elm (see Figs. 56, 

 57, 58, 59), and many of our 



Fig. r>4. A portion of a woodbine 

 (Ampelopsis). The stem tendrils 

 have attached themselves to a 

 smooth wall by means of disk-like 

 suckers.— After Strasburger. 



