SHOOTS. 



63 



Pig. B3. Woodbine (Ampelopsis) in a deciduons forest. The tree trunks are almost 

 covered by tlie 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.— After SrHraPEii. 



ttides or latitudes the subter- 

 ranean and prostrate tyjies 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 lof t)-. Among 

 stems of the erect type the tree 

 is the most impressive, and it 

 has developed into a great vari- 

 ety of forms or "habits.'" Any 

 one recognizes the great differ- 

 ence in the habits of the pine 

 and the elm (see Figs. 56, 

 57, 5S, 59), and many of our 



Fig. .'U. a portion of a woodbine 

 (.Ampelopsis). The stem tendrils 

 have attached themselves to a 

 smooth wall by means of disk-lilie 

 suckers.— After Stkasburgek. 



