82 



AMERICAN JOURNAL OF BOTANY 



[Vol. 8 



TABLE 10. Statistical constants for total number of bundles at base of hypocotyl of trimerotn 

 plants and their normal controls. Primary double bundles are counted as two 



Mean 



Standard Deviation C ^g^ rf 



Line 75 



Trimerous (N = 142) 

 Dimerous (N = 142) . 



Actual difference 



Relative difference 



Line 93 



Trimerous (N = 155) 

 Dimerous (N = 155) . 



I2.I7.04 

 9.07 . 08 



0.750=13.030 

 1.351 .054 



i4-90.6i 



+3.io.o8 



34.18 



I2.OIzb.O3 



9.86.o8 



-0.601 .062 -8.73.66 

 44-49 



0.627 .024 



5-22.20 



Actual difference +2.i 5 .o8 -O.8s6.o62 -9. 



Relative difference 

 Line 98 



Trimerous (N = 183) 

 Dimerous (N = 183) . 



Actual difference 



Relative difference 



Line 139 



Trimerous (N = 106) 

 Dimerous (N = 150) . 



21. 81 



1 1. 97 .02 



8.84.o6 



57-72 

 0.495 .018 



9.82.62 



+3-i3-o6 

 35-41 



1 1.91 .04 



8.II.02 



0.558 .026 



Actual difference | +3.80^.04 



Relative difference 46.85 



Line 143 



Trimerous (N = 221) ii-9O.O5 



Dimerous (N = 221) 8.45 .04 



Actual difference. . 

 Relative difference 



+3-45 -06 

 40.83 



32.97 



-0.695^3.046 -9. 

 58.40 



4. 69 .22 

 5-43-2i 



+o.ii8.03i -o. 

 26.82 



1. 105 .035 

 .831 .027 



SO 

 80 

 70 



60 

 r ^ 

 40 

 30 



20 







7S 



LIME 93 



/O II 12 /3 14 



/39 



10 II /2 13 



FIG. 16. Percentage frequency distribution of total bundles at base of hypocotyl in 

 dimerous and trimerous seedlings. Primary double bundles counted as two. 



