20 PEOPAGATION OF EOOTS AND STEMS 



will arise next spring. The old stems in the middle 

 show where the buds were at the close of the last season. 

 Fig. 23 shows one of the terminal buds. 



51. When rhizomes are cut in pieces, each piece having 

 at least one bud or "eye," the pieces may grow when planted. 

 A familiar example is the practice of dividing tubers of 

 potato. A severed piece of plant designed to be used to 

 propagate the plant is a cutting. See Fig. 28. 



28. Cuttings of canna rhizome. 



52. Cuttings of rhizomes are often made undesignedlij 

 or accidentally when land is cultivated. The cultivator or 

 harrow breaks up the rhizomes of quack -grass, Canada 

 thistle, toad flax, and other weeds, and scatters them over 

 the field. 



53. PROPAGATION BY MEANS OF ROOTS. Roots some- 

 times make buds and throw up shoots or new plants. 

 Severed roots, or root cuttings, often grow. Blackberries, 

 raspberries, and many plums and cherries, throw up shoots 

 or " suckers " from the roots ; and this propensity is usu- 



