THE AWAKENING OF THE SEED 



59 



47. Buckeye. The 

 plumule emerg- 

 ing from be- 

 tween the elon- 

 gated stalks of 

 the seed-leaves. 



in the cover is not near the caulicle (as in the Walnut, 

 Peach, etc.), where does the rupture occur? 



What part of the plant is the first 

 to burst through the opening ? What 

 advantage in this : Is it the cauli- 

 cle only which grows, or do other 

 parts enlarge and help to push it 

 out ? What part grows most rap- 

 idly at first in the Buckeye? (See 

 Figs. 46 to 49.) In the Walnut? 

 In the Onion? What other seeds 

 are like them in this respect ? Do 

 the seed-leaves grow at all in such seeds as the 

 Scarlet Runner ? What has broken the covers 



transversely, as shown in 

 Fig. 50? 



Does the caulicle invari- 

 ably push straight out through 

 the cover? Why does it 

 not turn aside on meeting 

 the cover, like the roots of 

 the Cocoanut in Fig. 45? 

 Study the germination of Corn: what is 

 the direction of least resistance for the 

 caulicle ? Examine the Buckeye, and 

 notice the pocket into which the caulicle 

 fits (Fig. 46. pkt) ; does this direct its 



48. Buckeye. A 



later stage. growth ? Do you find anything similar 



