VARIATION STUDIES IN BROME GRASS 
17 
distinct types of variation which occur. Plant No. 116 made an aver¬ 
age height growth in 1912 of nearly three feet. The plant was evi¬ 
dently possessed of a very great amount of vigor because in spite of 
the very much larger number of tillers it made a higher stem growth, 
a heavier infloresence and a higher, denser leaf growth than either 
plant No. 117 or No. 118 growing in the same row and immediately 
adjacent in the order given. 
Plant No. 78 (Plate No. 14) and Plant No. 105 (Plate No. 15) 
illustrate two contrasting growth habits. These two plants are prac¬ 
tically equal in stooling habit in so far as the lateral extent of the stool- 
ing area is concerned. Each has covered in three years’ time practi¬ 
cally the same area of ground. It will be noticed that the leaf height 
in plant No. 78 is low, while the leaf height in plant No. 105 extends 
Plate No. 16. 
well up into the infloresence. Altho the ground covered by these two 
plants was almost identical there was over three times the amount of 
weight of foliage produced at the time of cutting in the case of plant 
No. 105, indicating a very much better habit of plant for hay making 
purposes in the case of No. 105. It is interesting to note that the pro¬ 
geny rows from these individuals exhibited exactly the same character¬ 
istics, showing that in these speecific instances, pure lines were at¬ 
tained. The variations in spring starting of these different strains are 
