80 Richard H. Boerkcr 



Seedlings from Seeds 

 Size, Cm. Small Large 



0-0.5 2 O 



0.6-1.0 10 o 



1.1-1.5 17 6 



1.6-2.0 26 14 



2.1-2.5 24 19 



2.6-3.0 25 25 



."M-3-5 30 26 



3-6-4-0 23 31 



4-1-4-5 15 17 



4-6-5-0 11 15 



5 1-5 5 8 13 



5.6-6.0 4 12 



6.1-6.5 3 9 



6.6-7.0 o 8 



7-1-7-5 o 2 



7.6-8.0 1 2 



8.1-8.5 1 o 



8.6-9.0 1 1 



Total 200 200 



It will be seen that most of the plants from the small seeds fall 

 between the limits 0.6 and 5.0 while most of the plants from the 

 large seeds fall between the limits 1.6 and 6.0. In other words a 

 greater per cent, of small plants were found among the plants 

 that germinated from the small seeds. The average difference 

 in size of 200 plants of each kind was 0.84 cm. in favor of the 

 plants from the large seeds. 



The measurements taken for another climatic variety of Pinus 

 ponder osa were as follows : 



Pinus pondcrosa (South Dakota) — Age, 4 Days 



35 seedlings from small seeds averaged 46 cm. 



51 seedlings from large seeds averaged 5.6 cm. 



Here there is a difference of 1.0 cm. in favor of the seedlings 

 from the large seeds. 



Similar measurements were taken in the case of Pseiidotsugti 

 taxi folia: 



Pseudotsuga taxifolia (New Mexico) — Age, 4 Days 



100 seedlings from small seeds averaged 3.58 cm. 



100 seedlings from large seeds averaged 4.27 cm. 



