214 BULLETIN UNIVERSITY OP MONTANA 



distance from rhe tree. A great number are eaten by animals. Many 

 otliers tiave been stung by diptera and a little white grub has eaten the 

 food stored up for the plant. 



But here and there one in a great many has been pressed into the 

 ground and has felt the warmth of spring. It has split its weather worn 

 casing and protrudes its white radical. The subtle attraction of gravity 

 causes it to turn downward and bury itself still deeper in the earth. 

 From the split in the hypocolyl where it branches to the two cotyledons 

 arises the caulicle or stem. This is the part we will call the tree. The 

 figure (Fig. 6) shows an oak the second year of its growth as an inde- 

 pendent plant, or the fourth year from its beginning as a cell. 



We will not here treat further of the growth of the tree. To con- 

 sider in its entirety the manner of growth to the tree again producing 

 acorns would be a treatise on botany too long to be given here. 



We have traced the growth through the stages through which, in 

 a general way, all plants of the higher orders must go. 



