Germination of Forest Trees 81 



These 200 seedlings were classified according to their total length 

 as follows : 



Seedlings from Seeds 

 Size, Cm. Small Large 



0-0.5 O 



0.6-1.0 o o 



1.1-1.5 1 



1.6-2.0 9 3 



2-1-2-5 7 9 



2.6-3.0 20 8 



3-1-3-5 19 12 



3.6-4.0 12 12 



4-1-4-5 10 17 



4.6-5.0 11 12 



5-1-5-5 5 11 



5-6-6.0 5 7 



6.1-6.5 1 6 



6.6-7.0 2 



7-1-7-5 o 1 



Total 100 100 



It will be seen from this table that most of the seedlings from 

 the small seeds fall between the limits 2.6-5.0 while most of the 

 seedlings from the large seeds fall between the limits 3-1-5-5- 

 Just as in the case of Pinus ponderosa above we see that the 

 greater per cent, of small seedlings are found among the seedlings 

 that germinated from small seeds. The average difference in 

 size of 100 plants of each kind is 0.69 cm. in favor of the plants 

 from large seeds. 



The measurements taken for another climatic variety of Pseu- 

 dotsuga taxifolia were as follows : 



Pseudotsuga taxifolia (Colorado) — Age, 4 Days 



31 seedlings from small seeds averaged 3.4 cm. 



76 seedlings from large seeds averaged 3.9 cm. 



Here again there is a difference of 0.5 cm. in favor of the large 

 seeds. In comparing Pseudotsuga taxifolia with Pinus ponderosa 

 it is found that the size of the seed makes a greater difference in 

 the case of the latter species than in the case of the former. Also, 



