SHOOTS 
63 
FIG. 53. Woodbine (Ampelopsis) in a deciduous forest. The tree 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. After SCHIMPER. 
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 "habits." Any 
one recognizes the great differ- 
ence in the habits of the pine 
and the elm (see Figs. 56, 
57, 58, 59), and many of our 
FIG. 54. A portion of a woodbine 
(Ampelopsis). The stem tendrils 
have attached themselves to a 
smooth wall by means of disk-like 
suckers. After STRASBURGER. 
