THE TIGRIDIA 157 



ture plant is present not alone in the pollen grain 

 and the ovule, but also in the bulb. 



Even from the single bud of a bulb, as we 

 have seen illustrated in several cases, a new plant 

 will grow that will duplicate absolutely — in the 

 interpretation just given — the qualities of the 

 parent plant. And when we were studying 

 the fruit trees we saw that this is true of any 

 aerial bud if grown even on a foreign branch. 



Root bulb and aerial bud alike contain the 

 essential germ plasm of the individual of which 

 they are a part. They nurture potentiahties of 

 a new individual like the parent form. 



Germ Plasm and Body Plasm 



From all of which it follows plainly that the 

 germ plasm of the plant cannot be thought of 

 as isolated from the body plasm. It may well 

 enough be segregated within the substances of 

 any given cell. But that it is present in connec- 

 tion with the living cells of the plant everywhere, 

 from its roots to its remotest stem, is clearly 

 demonstrated by the everyday methods of prop- 

 agation employed in orchard and garden. 



Such being the case, it is difficult to avoid the 

 conviction that the germ plasm that is part and 

 parcel of every cell of the body plasm of the en- 

 tire plant is more or less subject to the environ- 



