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 
; 
Sef = > om —— 
<i S a " re 
/ 
like the common 
locust and the *\. 
silver-leaf poplar . 
become great nui- aS 
sances in the neigh- 
borhood of lawns /,} \y Sy 
Fig. 263.— Plant of a Black 1) TY ABS 
Raspberry, showing One and gardens by | Mii ‘ 
Branch (Stolon) with Several ne 
ef eice sending up sprouts 
in many places. When growing 
wild, such trees as these depend largely upon spreading 
by the roots to keep up their numbers.! 
443. Dispersal of Seed-Plants by Branches. — There is a 
shrub of the Honeysuckle Family,? 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 (Huonymus), and some other shrubs. Many 
herbs like the strawberry-plant and the cinquefoil send 
1 See Beal’s Seed Dispersa/, Chapters II and III. 
2 Viburnum lantanoides. 
