374 FOUNDATIONS OF BOTANY 



reproduce the plant. Either roots or rootstocks may travel 

 considerable distances horizontally in the course of their 

 growth and then shoot up and produce a new plant, which 

 later becomes independent of the parent. The sedges (Fig. 

 43) are excellent illustrations of this process, and trees 



like the common 

 locust and the 

 silver-leaf poplar 

 become great nui- 

 sances in the neigh- 

 borhood of lawns 



FIG. 263. Plant of a Black 



Raspberry, showing One and gardens by 



in many places. When growing 

 wild, such trees as these depend largely upon spreading 

 by the roots to keep up their numbers. 1 



443, Dispersal of Seed-Plants by Branches. There is a 

 shrub of the Honeysuckle Family, 2 common in the northern 

 woods, which is quite generally known as hobble-bush, or 

 witch-hobble, and sometimes as trip-toe. This is because 

 the branches take root at the end and so form loops which 

 catch the foot of the passer-by. The same habit of growth 

 is found in the raspberry-bush (Fig. 263), in one species of 

 strawberry-bush (Euonymus), and some other shrubs. Many 

 herbs like the strawberry-plant and the cinquefoil send 



1 See Beal's Seed Dispersal, Chapters II and in. 



2 Viburnum lantanoides. 



